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Prof. John Bell
Science and Engineering Faculty, School of Chemistry & Physics, University of Southern Queensland, Springfield Campus, Queensland 4350, Australia

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0 Energy Efficiency
0 Energy Storage
0 Photovoltaics
0 building energy modelling
0 Advanced glazings

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Journal article
Published: 10 November 2020 in Energy and Buildings
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Building energy optimisation is generally performed under present climate conditions with fixed simulation parameters (e.g. internal loads). However, climate change and variations in simulation parameters over the building’s life span may impact the optimised design. A key question is whether a particular energy-optimised design under present climate conditions would remain energy-optimised in the future. Accordingly, in this paper, a new simulation-based optimisation method is developed, which uses climate models and Ant Colony Optimisation to compare the energy-optimised designs under present and future climates. To demonstrate its potential, this method is applied to a typical office building in two Australian cities, Brisbane and Canberra. The results show that optimising under future climate conditions can lead to different optimal building designs. For Brisbane, the energy difference between optimising under present and future climate conditions is small, but in Canberra the cooling load is increased by up to 6%. This suggests that optimising the studied office building under present climate conditions is acceptable for Brisbane, while considering future climate may yield some savings in Canberra. Results also show that the energy-optimised building configuration for both future and present climates in Brisbane is less sensitive to changes in the load scenario than in Canberra.

ACS Style

Keivan Bamdad; Michael E. Cholette; Sara Omrani; John Bell. Future energy-optimised buildings — Addressing the impact of climate change on buildings. Energy and Buildings 2020, 231, 110610 .

AMA Style

Keivan Bamdad, Michael E. Cholette, Sara Omrani, John Bell. Future energy-optimised buildings — Addressing the impact of climate change on buildings. Energy and Buildings. 2020; 231 ():110610.

Chicago/Turabian Style

Keivan Bamdad; Michael E. Cholette; Sara Omrani; John Bell. 2020. "Future energy-optimised buildings — Addressing the impact of climate change on buildings." Energy and Buildings 231, no. : 110610.

Journal article
Published: 04 October 2020 in Journal of Building Performance Simulation
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ACS Style

Keivan Bamdad; Michael E. Cholette; John Bell. Building energy optimization using surrogate model and active sampling. Journal of Building Performance Simulation 2020, 13, 760 -776.

AMA Style

Keivan Bamdad, Michael E. Cholette, John Bell. Building energy optimization using surrogate model and active sampling. Journal of Building Performance Simulation. 2020; 13 (6):760-776.

Chicago/Turabian Style

Keivan Bamdad; Michael E. Cholette; John Bell. 2020. "Building energy optimization using surrogate model and active sampling." Journal of Building Performance Simulation 13, no. 6: 760-776.

Review article
Published: 17 July 2020 in Biosensors and Bioelectronics
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Respiration signals are a vital sign of life. Monitoring human breath provides critical information for health assessment, diagnosis, and treatment for respiratory diseases such as asthma, chronic bronchitis, and emphysema. Stretchable and wearable respiration sensors have recently attracted considerable interest toward monitoring physiological signals in the era of real time and portable healthcare systems. This review provides a snapshot on the recent development of stretchable sensors and wearable technologies for respiration monitoring. The article offers the fundamental guideline on the sensing mechanisms and design concepts of stretchable sensors for detecting vital breath signals such as temperature, humidity, airflow, stress and strain. A highlight on the recent progress in the integration of variable sensing components outlines feasible pathways towards multifunctional and multimodal sensor platforms. Structural designs of nanomaterials and platforms for stretchable respiration sensors are reviewed.

ACS Style

Toan Dinh; Thanh Nguyen; Hoang-Phuong Phan; Nam-Trung Nguyen; Dzung Viet Dao; John Bell. Stretchable respiration sensors: Advanced designs and multifunctional platforms for wearable physiological monitoring. Biosensors and Bioelectronics 2020, 166, 112460 .

AMA Style

Toan Dinh, Thanh Nguyen, Hoang-Phuong Phan, Nam-Trung Nguyen, Dzung Viet Dao, John Bell. Stretchable respiration sensors: Advanced designs and multifunctional platforms for wearable physiological monitoring. Biosensors and Bioelectronics. 2020; 166 ():112460.

Chicago/Turabian Style

Toan Dinh; Thanh Nguyen; Hoang-Phuong Phan; Nam-Trung Nguyen; Dzung Viet Dao; John Bell. 2020. "Stretchable respiration sensors: Advanced designs and multifunctional platforms for wearable physiological monitoring." Biosensors and Bioelectronics 166, no. : 112460.

Full paper
Published: 23 June 2020 in Advanced Functional Materials
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To achieve semiconducting materials with high electron mobility in organic field-effect transistors (OFETs), low-lying energy levels (the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO)) and favorable molecular packing and ordering are two crucial factors. Here, it is reported that the incorporation of pyridine and selenophene into the backbone of a diketopyrrolopyrrole (DPP)-based copolymer produces a high-electron-mobility semiconductor, PDPPy-Se. Compared with analogous polymers based on other DPP derivatives and selenophene, PDPPy-Se features a lower LUMO that can decrease the electron transfer barrier for more effective electron injection, and simultaneously a lower HOMO that, however, can increase the hole transfer barrier to suppress the hole injection. Combined with thermal annealing at 240 °C for thin film morphology optimization to achieve large-scale crystallite domains with tight molecular packing for effective charge transport along the conducting channel, OFET devices fabricated with PDPPy-Se exhibit an n-type-dominant performance with an electron mobility (μe) as high as 2.22 cm2 V−1 s−1 and a hole/electron mobility ratio (μh/μe) of 0.26. Overall, this study demonstrates a simple yet effective approach to boost the electron mobility in organic transistors by synergistic use of pyridine and selenophene in the backbone of a DPP-based copolymer.

ACS Style

Qian Liu; Shohei Kumagai; Sergei Manzhos; Yingqian Chen; Indunil Angunawela; Masrur Morshed Nahid; Krishna Feron; Steven E. Bottle; John Bell; Harald Ade; Jun Takeya; Prashant Sonar. Synergistic Use of Pyridine and Selenophene in a Diketopyrrolopyrrole‐Based Conjugated Polymer Enhances the Electron Mobility in Organic Transistors. Advanced Functional Materials 2020, 30, 2000489 .

AMA Style

Qian Liu, Shohei Kumagai, Sergei Manzhos, Yingqian Chen, Indunil Angunawela, Masrur Morshed Nahid, Krishna Feron, Steven E. Bottle, John Bell, Harald Ade, Jun Takeya, Prashant Sonar. Synergistic Use of Pyridine and Selenophene in a Diketopyrrolopyrrole‐Based Conjugated Polymer Enhances the Electron Mobility in Organic Transistors. Advanced Functional Materials. 2020; 30 (34):2000489.

Chicago/Turabian Style

Qian Liu; Shohei Kumagai; Sergei Manzhos; Yingqian Chen; Indunil Angunawela; Masrur Morshed Nahid; Krishna Feron; Steven E. Bottle; John Bell; Harald Ade; Jun Takeya; Prashant Sonar. 2020. "Synergistic Use of Pyridine and Selenophene in a Diketopyrrolopyrrole‐Based Conjugated Polymer Enhances the Electron Mobility in Organic Transistors." Advanced Functional Materials 30, no. 34: 2000489.

Paper
Published: 18 May 2020 in Nanoscale Advances
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Three-point bending tests of a pristine rutile TiO2 NW.

ACS Style

Qiong Liu; Haifei Zhan; Yihan Nie; Yanan Xu; Huaiyong Zhu; Ziqi Sun; John M. Bell; Arinxin Bo; Yuantong Gu. Effect of Fe-doping on bending elastic properties of single-crystalline rutile TiO2 nanowires. Nanoscale Advances 2020, 2, 2800 -2807.

AMA Style

Qiong Liu, Haifei Zhan, Yihan Nie, Yanan Xu, Huaiyong Zhu, Ziqi Sun, John M. Bell, Arinxin Bo, Yuantong Gu. Effect of Fe-doping on bending elastic properties of single-crystalline rutile TiO2 nanowires. Nanoscale Advances. 2020; 2 (7):2800-2807.

Chicago/Turabian Style

Qiong Liu; Haifei Zhan; Yihan Nie; Yanan Xu; Huaiyong Zhu; Ziqi Sun; John M. Bell; Arinxin Bo; Yuantong Gu. 2020. "Effect of Fe-doping on bending elastic properties of single-crystalline rutile TiO2 nanowires." Nanoscale Advances 2, no. 7: 2800-2807.

Communication
Published: 14 May 2020 in Green Chemistry
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An ionic liquid-based green synthesis of perovskite nanocrystals towards practical applications.

ACS Style

Minh Tam Hoang; Ngoc Duy Pham; Yang Yang; Vincent Tiing Tiong; Chao Zhang; Ke Gui; Hong Chen; Jin Chang; Jianpu Wang; Dmitri Golberg; John Bell; Hongxia Wang. A facile, environmentally friendly synthesis of strong photo-emissive methylammonium lead bromide perovskite nanocrystals enabled by ionic liquids. Green Chemistry 2020, 22, 3433 -3440.

AMA Style

Minh Tam Hoang, Ngoc Duy Pham, Yang Yang, Vincent Tiing Tiong, Chao Zhang, Ke Gui, Hong Chen, Jin Chang, Jianpu Wang, Dmitri Golberg, John Bell, Hongxia Wang. A facile, environmentally friendly synthesis of strong photo-emissive methylammonium lead bromide perovskite nanocrystals enabled by ionic liquids. Green Chemistry. 2020; 22 (11):3433-3440.

Chicago/Turabian Style

Minh Tam Hoang; Ngoc Duy Pham; Yang Yang; Vincent Tiing Tiong; Chao Zhang; Ke Gui; Hong Chen; Jin Chang; Jianpu Wang; Dmitri Golberg; John Bell; Hongxia Wang. 2020. "A facile, environmentally friendly synthesis of strong photo-emissive methylammonium lead bromide perovskite nanocrystals enabled by ionic liquids." Green Chemistry 22, no. 11: 3433-3440.

Research article
Published: 12 April 2020 in The Journal of Physical Chemistry C
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Titanium dioxide (TiO2) nanowires (NWs) are usually considered to be brittle semiconductor materials, which limits their use in strain-related applications, even though they are already widely applied in various fields. Based on observations using an in situ transmission electron microscopy (TEM) method, we find, for the first time, that individual crystalline TiO2 NWs with a bronze phase (TiO2-B) can exhibit an ultralarge elastic bending strain of up to 18.7%. Using an in situ atomic-scale study, the underlying mechanisms of the ultralarge bending deformation of TiO2-B NWs under the {100} system are revealed to be governed by lattice shear and rich dislocation movements; the lattice shearing is supported by numerical simulations. Locally, large-scale sheared lattices with a shear strain of up to 10.7% can be observed in a bent NW. It is believed that the large-scale lattice shearing deformation offers the NW the ability to absorb a large bending energy so that fast dislocation aggregation and propagation are avoided. Therefore, the TiO2-B NWs can endure an ultralarge bending strain without crack formation or amorphization. However, it is found that the lattice-shear governed bending mechanism is not applied in the {100} system. These results are able to provide more opportunities for the strain engineering of TiO2 NWs and also help to promote the potential applications of TiO2-NWs-based flexible devices.

ACS Style

Qiong Liu; Yihan Nie; Haifei Zhan; Huaiyong Zhu; Ziqi Sun; John Bell; Arixin Bo; Yuantong Gu. Atomistic Mechanisms of Ultralarge Bending Deformation of Single-Crystalline TiO2–B Nanowires. The Journal of Physical Chemistry C 2020, 124, 11174 -11182.

AMA Style

Qiong Liu, Yihan Nie, Haifei Zhan, Huaiyong Zhu, Ziqi Sun, John Bell, Arixin Bo, Yuantong Gu. Atomistic Mechanisms of Ultralarge Bending Deformation of Single-Crystalline TiO2–B Nanowires. The Journal of Physical Chemistry C. 2020; 124 (20):11174-11182.

Chicago/Turabian Style

Qiong Liu; Yihan Nie; Haifei Zhan; Huaiyong Zhu; Ziqi Sun; John Bell; Arixin Bo; Yuantong Gu. 2020. "Atomistic Mechanisms of Ultralarge Bending Deformation of Single-Crystalline TiO2–B Nanowires." The Journal of Physical Chemistry C 124, no. 20: 11174-11182.

Full paper
Published: 20 December 2019 in Advanced Functional Materials
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Fine‐tuning of the charge carrier polarity in organic transistors is an important step toward high‐performance organic complementary circuits and related devices. Here, three new semiconducting polymers, namely, pDPF‐DTF2, pDPSe‐DTF2, and pDPPy‐DTF2, are designed and synthesized using furan, selenophene, and pyridine flanking group‐based diketopyrrolopyrrole cores, respectively. Upon evaluating their electrical properties in transistor devices, the best performance has been achieved for pDPSe‐DTF2 with the highest and average hole mobility of 1.51 and 1.22 cm2 V−1 s−1, respectively. Most intriguingly, a clear charge‐carrier‐polarity change is observed when the devices are measured under vacuum. The pDPF‐DTF2 polymer exhibits a balanced ambipolar performance with the µh/µe ratio of 1.9, whereas pDPSe‐DTF2 exhibits p‐type dominated charge carrier transport properties with the µh/µe ratio of 26.7. Such a charge carrier transport change is due to the strong electron‐donating nature of the selenophene. Furthermore, pDPPy‐DTF2 with electron‐withdrawing pyridine flanking units demonstrates unipolar n‐type charge transport properties with an electron mobility as high as 0.20 cm2 V−1 s−1. Overall, this study demonstrates a simple yet effective approach to switch the charge carrier polarity in transistors by varying the electron affinity of flanking groups of the diketopyrrolopyrrole unit.

ACS Style

Qian Liu; Yang Wang; Akihiro Kohara; Hidetoshi Matsumoto; Sergei Manzhos; Krishna Feron; Steven E. Bottle; John Bell; Tsuyoshi Michinobu; Prashant Sonar. Tuning the Charge Carrier Polarity of Organic Transistors by Varying the Electron Affinity of the Flanked Units in Diketopyrrolopyrrole‐Based Copolymers. Advanced Functional Materials 2019, 30, 1 .

AMA Style

Qian Liu, Yang Wang, Akihiro Kohara, Hidetoshi Matsumoto, Sergei Manzhos, Krishna Feron, Steven E. Bottle, John Bell, Tsuyoshi Michinobu, Prashant Sonar. Tuning the Charge Carrier Polarity of Organic Transistors by Varying the Electron Affinity of the Flanked Units in Diketopyrrolopyrrole‐Based Copolymers. Advanced Functional Materials. 2019; 30 (7):1.

Chicago/Turabian Style

Qian Liu; Yang Wang; Akihiro Kohara; Hidetoshi Matsumoto; Sergei Manzhos; Krishna Feron; Steven E. Bottle; John Bell; Tsuyoshi Michinobu; Prashant Sonar. 2019. "Tuning the Charge Carrier Polarity of Organic Transistors by Varying the Electron Affinity of the Flanked Units in Diketopyrrolopyrrole‐Based Copolymers." Advanced Functional Materials 30, no. 7: 1.

Journal article
Published: 25 November 2019 in Nanomaterials
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The utilization of vertical graphene nanosheet (VGN) electrodes for energy storage in supercapacitors has long been desired yet remains challenging, mostly because of insufficient control of nanosheet stacking, density, surface functionality, and reactivity. Here, we report a single-step, scalable, and environment-friendly plasma-assisted process for the fabrication of densely packed yet accessible surfaces of forested VGNs (F-VGNs) using coconut oil as precursor. The morphology of F-VGNs could be controlled from a continuous thick structure to a hierarchical, cauliflower-like structure that was accessible by the electrolyte ions. The surface of individual F-VGNs was slightly oxygenated, while their interior remained oxygen-free. The fabricated thick (>10 μm) F-VGN electrodes presented specific capacitance up to 312 F/g at a voltage scan rate of 10 mV/s and 148 F/g at 500 mV/s with >99% retention after 1000 cycles. This versatile approach suggests realistic opportunities for further improvements, potentially leading to the integration of F-VGN electrodes in next-generation energy storage devices.

ACS Style

Shailesh Kumar; Phil Martin; Avi Bendavid; John Bell; Kostya (Ken) Ostrikov. Oriented Graphenes from Plasma-Reformed Coconut Oil for Supercapacitor Electrodes. Nanomaterials 2019, 9, 1679 .

AMA Style

Shailesh Kumar, Phil Martin, Avi Bendavid, John Bell, Kostya (Ken) Ostrikov. Oriented Graphenes from Plasma-Reformed Coconut Oil for Supercapacitor Electrodes. Nanomaterials. 2019; 9 (12):1679.

Chicago/Turabian Style

Shailesh Kumar; Phil Martin; Avi Bendavid; John Bell; Kostya (Ken) Ostrikov. 2019. "Oriented Graphenes from Plasma-Reformed Coconut Oil for Supercapacitor Electrodes." Nanomaterials 9, no. 12: 1679.

Journal article
Published: 01 November 2019 in Energy Strategy Reviews
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ACS Style

Fanny Boulaire; Afsaneh Narimani; John Bell; Robin Drogemuller; Desley Vine; Laurie Buys; Geoffrey Walker. Benefit assessment of battery plus solar for customers and the grid. Energy Strategy Reviews 2019, 26, 1 .

AMA Style

Fanny Boulaire, Afsaneh Narimani, John Bell, Robin Drogemuller, Desley Vine, Laurie Buys, Geoffrey Walker. Benefit assessment of battery plus solar for customers and the grid. Energy Strategy Reviews. 2019; 26 ():1.

Chicago/Turabian Style

Fanny Boulaire; Afsaneh Narimani; John Bell; Robin Drogemuller; Desley Vine; Laurie Buys; Geoffrey Walker. 2019. "Benefit assessment of battery plus solar for customers and the grid." Energy Strategy Reviews 26, no. : 1.

Journal article
Published: 01 November 2019 in Organic Electronics
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ACS Style

Qian Liu; Huabin Sun; Supreetha Paleyanda Ponnappa; Krishna Feron; Sergei Manzhos; Michael Jones; Steven E. Bottle; John Bell; Yong-Young Noh; Prashant Sonar. Naphthalene flanked diketopyrrolopyrrole: A new DPP family member and its comparative optoelectronic properties with thiophene- and furan- flanked DPP counterparts. Organic Electronics 2019, 74, 290 -298.

AMA Style

Qian Liu, Huabin Sun, Supreetha Paleyanda Ponnappa, Krishna Feron, Sergei Manzhos, Michael Jones, Steven E. Bottle, John Bell, Yong-Young Noh, Prashant Sonar. Naphthalene flanked diketopyrrolopyrrole: A new DPP family member and its comparative optoelectronic properties with thiophene- and furan- flanked DPP counterparts. Organic Electronics. 2019; 74 ():290-298.

Chicago/Turabian Style

Qian Liu; Huabin Sun; Supreetha Paleyanda Ponnappa; Krishna Feron; Sergei Manzhos; Michael Jones; Steven E. Bottle; John Bell; Yong-Young Noh; Prashant Sonar. 2019. "Naphthalene flanked diketopyrrolopyrrole: A new DPP family member and its comparative optoelectronic properties with thiophene- and furan- flanked DPP counterparts." Organic Electronics 74, no. : 290-298.

Research article
Published: 15 October 2019 in Nano Letters
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It is challenging but important to understand the mechanical properties of one-dimensional (1D) nanomaterials for their design and integration into nanodevices. Generally, brittle ceramic nanowires (NWs) cannot withstand a large bending strain. Herein, in situ bending deformation of titanium dioxide (TiO2) NWs with a bronze/anatase dual-phase was carried out inside a transmission electron microscopy (TEM) system. An ultralarge bending strain up to 20.3% was observed on individual NWs. Through an in situ atomic-scale study, the large bending behavior for a dual-phase TiO2 NW was found to be related to a continuous crystalline-structure evolution including phase transition, small deformation twinning, and dislocation nucleation and movements. Additionally, no amorphization or crack occurred in the dual-phase TiO2 NW even under an ultralarge bending strain. These results revealed that an individual ceramic NW can undergo a large bending strain with rich defect activities.

ACS Style

Qiong Liu; Haifei Zhan; Huaiyong Zhu; Hongwei Liu; Ziqi Sun; John Bell; Arixin Bo; Yuantong Gu. In Situ Atomic-Scale Study on the Ultralarge Bending Behaviors of TiO2–B/Anatase Dual-Phase Nanowires. Nano Letters 2019, 19, 7742 -7749.

AMA Style

Qiong Liu, Haifei Zhan, Huaiyong Zhu, Hongwei Liu, Ziqi Sun, John Bell, Arixin Bo, Yuantong Gu. In Situ Atomic-Scale Study on the Ultralarge Bending Behaviors of TiO2–B/Anatase Dual-Phase Nanowires. Nano Letters. 2019; 19 (11):7742-7749.

Chicago/Turabian Style

Qiong Liu; Haifei Zhan; Huaiyong Zhu; Hongwei Liu; Ziqi Sun; John Bell; Arixin Bo; Yuantong Gu. 2019. "In Situ Atomic-Scale Study on the Ultralarge Bending Behaviors of TiO2–B/Anatase Dual-Phase Nanowires." Nano Letters 19, no. 11: 7742-7749.

Article
Published: 27 July 2019 in Optical and Quantum Electronics
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ZBLAN glass tends to undergo heavy devitrification, forming crystallites that act as scattering centers and results in a large attenuation loss. In this study, attenuation loss values were obtained for ZBLAN glass test samples that were melted and then cooled rapidly at a rate of 4000 °C/min, which yielded amorphous samples that were free of micro/nano-crystalline inclusions. Using an approach by Forouhi and Bloomer, which incorporates Kramers–Kronig relations, in conjunction with measured optical data using ellipsometry, an attenuation loss of 0.092 dB/Km at 1800 nm wavelength was estimated for amorphous ZBLAN test samples.

ACS Style

Teng-Cheong Ong; Theodore A. Steinberg; Esa Jaatinen; John Bell. Semi-empirical estimation of the attenuation loss for amorphous ZBLAN glass. Optical and Quantum Electronics 2019, 51, 1 -13.

AMA Style

Teng-Cheong Ong, Theodore A. Steinberg, Esa Jaatinen, John Bell. Semi-empirical estimation of the attenuation loss for amorphous ZBLAN glass. Optical and Quantum Electronics. 2019; 51 (8):1-13.

Chicago/Turabian Style

Teng-Cheong Ong; Theodore A. Steinberg; Esa Jaatinen; John Bell. 2019. "Semi-empirical estimation of the attenuation loss for amorphous ZBLAN glass." Optical and Quantum Electronics 51, no. 8: 1-13.

Research news
Published: 02 July 2019 in Advanced Materials
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The increasing demand for constructing ecological civilization and promoting socially sustainable development has encouraged scientists to develop bioinspired materials with required properties and functions. By bringing science and nature together, plenty of novel materials with extraordinary properties can be created by learning the best from natural species. In combination with the exceptional features of 2D nanomaterials, bioinspired 2D nanomaterials and technologies have delivered significant achievements. Here, the progress over the past decade in bioinspired 2D photonic structures, energy nanomaterials, and superwetting materials, is summarized, together with the challenges and opportunities in developing bioinspired materials for sustainable energy and environmental technologies.

ACS Style

Yuanwen Zhang; Jun Mei; Cheng Yan; Ting Liao; John Bell; Ziqi Sun. Bioinspired 2D Nanomaterials for Sustainable Applications. Advanced Materials 2019, 32, e1902806 .

AMA Style

Yuanwen Zhang, Jun Mei, Cheng Yan, Ting Liao, John Bell, Ziqi Sun. Bioinspired 2D Nanomaterials for Sustainable Applications. Advanced Materials. 2019; 32 (18):e1902806.

Chicago/Turabian Style

Yuanwen Zhang; Jun Mei; Cheng Yan; Ting Liao; John Bell; Ziqi Sun. 2019. "Bioinspired 2D Nanomaterials for Sustainable Applications." Advanced Materials 32, no. 18: e1902806.

Journal article
Published: 25 May 2019 in Electrochimica Acta
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In the complementary electrochromic devices (ECDs), nickel oxide (NiOx) is the mostly studied material as counter electrode for its neutral brown color and relatively large coloration efficiency. However, there exist some obstacles that limit the utilization of NiOx counter electrode in ECDs due to the poor transparency in the bleached state and inadequate ion storage capacity. Here, a new type of counter electrode LixNiOy layers has been investigated, and LixNiOy-based all-solid-state inorganic ECD has been successfully fabricated by magnetron sputtering. The prepared ECD exhibits excellent electrochromic performance with an optical contrast of 72.8% at 550 nm, and desirable response time with 13 s and 3.5 s for coloring and bleaching process, respectively. Furthermore, the advantages of LixNiOy-based ECDs have been demonstrated due to the gradient distribution of Li element in the LixNiOy layer. The LixNiOy layer in the proposed ECD shows a Li-rich surface, which can provide more Li ions for the coloration process. Meanwhile, the bottom of LixNiOy layer is Li-poor, which can accommodate more ions during the bleaching reaction. This structure shows superiority over the traditional NiOx-based structure, as well as some other structures. Hence, our work guided a promising new structure for the electrochromic practical application and commercial mass production.

ACS Style

Ying Zhu; Lingling Xie; Tianci Chang; John Bell; Aibin Huang; Ping Jin; Shanhu Bao. High performance all-solid-state electrochromic device based on LixNiOy layer with gradient Li distribution. Electrochimica Acta 2019, 317, 10 -16.

AMA Style

Ying Zhu, Lingling Xie, Tianci Chang, John Bell, Aibin Huang, Ping Jin, Shanhu Bao. High performance all-solid-state electrochromic device based on LixNiOy layer with gradient Li distribution. Electrochimica Acta. 2019; 317 ():10-16.

Chicago/Turabian Style

Ying Zhu; Lingling Xie; Tianci Chang; John Bell; Aibin Huang; Ping Jin; Shanhu Bao. 2019. "High performance all-solid-state electrochromic device based on LixNiOy layer with gradient Li distribution." Electrochimica Acta 317, no. : 10-16.

Paper
Published: 22 May 2019 in Nanoscale
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Layered sodium titanate nanowires exhibit ultra-large bending strain, which is accompanied by dislocation motion.

ACS Style

Qiong Liu; Haifei Zhan; Huai Yong Zhu; Ziqi Sun; John Bell; Arixin Bo; Yuantong Gu. Atomic-scale investigation on the ultra-large bending behaviours of layered sodium titanate nanowires. Nanoscale 2019, 11, 11847 -11855.

AMA Style

Qiong Liu, Haifei Zhan, Huai Yong Zhu, Ziqi Sun, John Bell, Arixin Bo, Yuantong Gu. Atomic-scale investigation on the ultra-large bending behaviours of layered sodium titanate nanowires. Nanoscale. 2019; 11 (24):11847-11855.

Chicago/Turabian Style

Qiong Liu; Haifei Zhan; Huai Yong Zhu; Ziqi Sun; John Bell; Arixin Bo; Yuantong Gu. 2019. "Atomic-scale investigation on the ultra-large bending behaviours of layered sodium titanate nanowires." Nanoscale 11, no. 24: 11847-11855.

Paper
Published: 13 May 2019 in New Journal of Chemistry
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A novel compound NAI-PVP-NAI was utilized as a blue emissive layer for organic light emitting diodes and as an acceptor and a donor for organic solar cells.

ACS Style

Thu-Trang Do; Sudam Chavhan; Jegadesan Subbiah; Tsu-Hao Ou; Sergei Manzhos; David Jones; John M. Bell; Jwo-Huei Jou; Prashant Sonar. Naphthalimide end-capped diphenylacetylene: a versatile organic semiconductor for blue light emitting diodes and a donor or an acceptor for solar cells. New Journal of Chemistry 2019, 43, 9243 -9254.

AMA Style

Thu-Trang Do, Sudam Chavhan, Jegadesan Subbiah, Tsu-Hao Ou, Sergei Manzhos, David Jones, John M. Bell, Jwo-Huei Jou, Prashant Sonar. Naphthalimide end-capped diphenylacetylene: a versatile organic semiconductor for blue light emitting diodes and a donor or an acceptor for solar cells. New Journal of Chemistry. 2019; 43 (23):9243-9254.

Chicago/Turabian Style

Thu-Trang Do; Sudam Chavhan; Jegadesan Subbiah; Tsu-Hao Ou; Sergei Manzhos; David Jones; John M. Bell; Jwo-Huei Jou; Prashant Sonar. 2019. "Naphthalimide end-capped diphenylacetylene: a versatile organic semiconductor for blue light emitting diodes and a donor or an acceptor for solar cells." New Journal of Chemistry 43, no. 23: 9243-9254.

Journal article
Published: 30 March 2019 in Organic Electronics
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Herein, two copolymers, poly [(6,6,12,12-tetraoctylindenofluorene)-co-(2,1,3-benzothiodiazole)] (PIFL-BT) and poly [(6,6,12,12-tetraoctylindenofluorene)-co-(2,1,3- benzooxadiazole)] (PIFL-BO) were synthesized and characterized. The effect of two electron accepting moieties such as benzothiodiazole (BT) and benzooxadiazole (BO) in combination with common tetraalkyl substituted indenofluorene building block into the backbone of conjugated polymer studied in detail via thermal, optical and electrochemical characteristics. To investigate the electroluminescence characteristics, both organic light emitting diodes (OLEDs) and light emitting electrochemical cells (LECs) devices are fabricated using copolymers as an active light-emitting layer. For the OLED devices, only polymer PIFL-BT emitted yellow light with CIE coordinates of (0.43, 0.55), a maximum current efficiency (CEmax) of 0.24 cd/A, a maximum power efficiency (PEmax) of 0.11 lm/W and a maximum brightness (MBmax) of 1398 cd/m2. For the LEC device, both materials showed light emission and higher current density than OLEDs devices, indicating better carrier injection in LECs.

ACS Style

Thu-Trang Do; Keiichiro Matsuki; Tomo Sakanoue; Fu-Lung Wong; Sergei Manzhos; Chun-Sing Lee; John Bell; Taishi Takenobu; Prashant Sonar. Indenofluorene-based-copolymers: Influence of electron-deficient benzothiadiazole (BT) and benzooxadiazole (BO) moieties on light emitting devices. Organic Electronics 2019, 70, 14 -24.

AMA Style

Thu-Trang Do, Keiichiro Matsuki, Tomo Sakanoue, Fu-Lung Wong, Sergei Manzhos, Chun-Sing Lee, John Bell, Taishi Takenobu, Prashant Sonar. Indenofluorene-based-copolymers: Influence of electron-deficient benzothiadiazole (BT) and benzooxadiazole (BO) moieties on light emitting devices. Organic Electronics. 2019; 70 ():14-24.

Chicago/Turabian Style

Thu-Trang Do; Keiichiro Matsuki; Tomo Sakanoue; Fu-Lung Wong; Sergei Manzhos; Chun-Sing Lee; John Bell; Taishi Takenobu; Prashant Sonar. 2019. "Indenofluorene-based-copolymers: Influence of electron-deficient benzothiadiazole (BT) and benzooxadiazole (BO) moieties on light emitting devices." Organic Electronics 70, no. : 14-24.

Review article
Published: 05 March 2019 in Progress in Materials Science
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Cobalt oxide nanostructures have been considered as promising electrode materials for various electrochemical applications, especially for batteries, supercapacitors, and electrocatalysis, owing to their unparalleled advantages of high theoretical capacity, highly-active catalytic properties, and outstanding thermal/chemical stability. If hybridized with property-complementary nanomaterials, such as nanocarbon, CNTs, graphene, metal oxides/sulfides, conductive polymers, etc., their electrochemical properties can be further enhanced in terms of specific reversible capacity/capacitance, rate capability, cycling stability, and catalytic activity. In this review, we first give a comprehensive overview on recent progress in both monolithic cobalt oxide nanostructures and their hybrid nanomaterials for batteries, supercapacitors, and electrocatalysis applications. Then, structure-property relationships of the cobalt oxide based nanomaterials and current challenges in both nanoarchitectures design and their applications in electrochemical energy devices are proposed, and an outlook on future research of this family of materials in electrochemical energy applications are brought forward. This understanding on the relationships of synthesis-nano/microstructure-property-performance of cobalt oxide-based nanomaterials is expected to lay a good foundation for pushing this promising class of materials to the practical application in energy conversion and storage devices and to provide a good reference for the readers in the fields of materials, chemistry, sustainable energy, and nanotechnology.

ACS Style

Jun Mei; Ting Liao; Godwin A. Ayoko; John Bell; Ziqi Sun. Cobalt oxide-based nanoarchitectures for electrochemical energy applications. Progress in Materials Science 2019, 103, 596 -677.

AMA Style

Jun Mei, Ting Liao, Godwin A. Ayoko, John Bell, Ziqi Sun. Cobalt oxide-based nanoarchitectures for electrochemical energy applications. Progress in Materials Science. 2019; 103 ():596-677.

Chicago/Turabian Style

Jun Mei; Ting Liao; Godwin A. Ayoko; John Bell; Ziqi Sun. 2019. "Cobalt oxide-based nanoarchitectures for electrochemical energy applications." Progress in Materials Science 103, no. : 596-677.

Article
Published: 29 December 2018 in International Journal of Applied Glass Science
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ZBLAN glass is a heavy metal fluoride glass that tends to undergo heavy devitrification, resulting in a crystalline material. It has many applications, including its use as an optical waveguide for fibre optic technology. However, when the glass is processed with traditional casting techniques, crystallites form readily that act as scattering centres, which results in large attenuation losses. In this study, it has been experimentally demonstrated that processing ZBLAN rapidly with a heating rate of 25,000 K/min and cooling rate of 4,000 K/min yields test samples that are fully amorphous and retain a disordered molecular arrangement characteristic of its molten state. This novel method was developed using a specifically designed equipment named a Rapid Electro‐thermal Processing Device, or “REPD”. The REPD applies ohmic heating and thermal conduction to a heat sink to rapidly process the ZBLAN material. The absence of crystallites in the rapidly processed ZBLAN test samples were verified using transmission electron microscopy (TEM) analysis. Applying a theoretical algorithm, the critical cooling rate for yielding fully amorphous ZBLAN glass was determined to be 1081 K/min for a sample volume of 9.4 x 10‐8 m3. This article is protected by copyright. All rights reserved.

ACS Style

Teng‐Cheong Ong; Ben Fogarty; Ted Steinberg; Esa Jaatinen; John Bell. Suppression of crystallization in ZBLAN glass by rapid heating and cooling processing. International Journal of Applied Glass Science 2018, 10, 391 -400.

AMA Style

Teng‐Cheong Ong, Ben Fogarty, Ted Steinberg, Esa Jaatinen, John Bell. Suppression of crystallization in ZBLAN glass by rapid heating and cooling processing. International Journal of Applied Glass Science. 2018; 10 (3):391-400.

Chicago/Turabian Style

Teng‐Cheong Ong; Ben Fogarty; Ted Steinberg; Esa Jaatinen; John Bell. 2018. "Suppression of crystallization in ZBLAN glass by rapid heating and cooling processing." International Journal of Applied Glass Science 10, no. 3: 391-400.