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The addition of nanomaterials, such as graphene and graphene oxide, can improve the mechanical properties of hydroxyapatite (HA) nanocomposites (NCPs). However, both the dispersive state of the starting materials and the sintering process play central roles in improving the mechanical properties of the final HA NCPs. Herein, we studied the mechanical properties of a reduced graphene oxide (r-GO)/HA NCP, for which an ultra-high shear force was used to achieve a nano-sized mixture through the dispersion of r-GO. A low-temperature, short-duration spark plasma sintering (SPS) process was used to realize high-density, non-decomposing r-GO/HA NCPs with an improved fracture toughness of 97.8% via the addition of 0.5 wt.% r-GO. Greater quantities of r-GO improve the hardness and the fracture strength. The improved mechanical properties of r-GO/HA NCPs suggest their future applicability in biomedical engineering, including use as sintered bodies in dentistry, plasma spray-coatings for metal surfaces, and materials for 3D printing in orthopedics.
Bing-Yen Wang; Steven Hsu; Chia-Man Chou; Tair-I Wu; Vincent Hsiao. Improved Mechanical Properties of Ultra-High Shear Force Mixed Reduced Graphene Oxide/Hydroxyapatite Nanocomposite Produced Using Spark Plasma Sintering. Nanomaterials 2021, 11, 986 .
AMA StyleBing-Yen Wang, Steven Hsu, Chia-Man Chou, Tair-I Wu, Vincent Hsiao. Improved Mechanical Properties of Ultra-High Shear Force Mixed Reduced Graphene Oxide/Hydroxyapatite Nanocomposite Produced Using Spark Plasma Sintering. Nanomaterials. 2021; 11 (4):986.
Chicago/Turabian StyleBing-Yen Wang; Steven Hsu; Chia-Man Chou; Tair-I Wu; Vincent Hsiao. 2021. "Improved Mechanical Properties of Ultra-High Shear Force Mixed Reduced Graphene Oxide/Hydroxyapatite Nanocomposite Produced Using Spark Plasma Sintering." Nanomaterials 11, no. 4: 986.
Negative air ions (NAIs) have been widely harnessed in recent technologies for air pollutant removal and their beneficial effects on human health, including allergy relief and neurotransmitter modulation. Herein, we report a corona-type, mechanically stimulated triboelectric NAI generator. Using the high output voltage from a triboelectric nanogenerator, air molecules can be locally ionized from carbon fibre electrodes through various movements, with the electron–ion transformation efficiency reaching up to 97%. Using a palm-sized device, 1 × 1013 NAIs (theoretically 1 × 105 ions cm−3 in 100 m3 space) are produced in one sliding motion, and particulate matter (PM 2.5) can be rapidly reduced from 999 to 0 µg m−3 in 80 s (in a 5,086 cm3 glass chamber) under an operation frequency of 0.25 Hz. This triboelectric NAI generator is simple, safe and effective, providing an appealing alternative, sustainable avenue to improving health and contributing to a cleaner environment. Negative air ions (NAIs) have been widely harnessed for air purification and environmental therapeutics. Herein, the authors construct a triboelectric NAI generator that produces NAIs with high efficiency, stimulated by mechanical motions.
Hengyu Guo; Jie Chen; Longfei Wang; Aurelia Chi Wang; Yafeng Li; Chunhua An; Jr-Hau He; Chenguo Hu; Vincent K. S. Hsiao; Zhong Lin Wang. A highly efficient triboelectric negative air ion generator. Nature Sustainability 2020, 4, 147 -153.
AMA StyleHengyu Guo, Jie Chen, Longfei Wang, Aurelia Chi Wang, Yafeng Li, Chunhua An, Jr-Hau He, Chenguo Hu, Vincent K. S. Hsiao, Zhong Lin Wang. A highly efficient triboelectric negative air ion generator. Nature Sustainability. 2020; 4 (2):147-153.
Chicago/Turabian StyleHengyu Guo; Jie Chen; Longfei Wang; Aurelia Chi Wang; Yafeng Li; Chunhua An; Jr-Hau He; Chenguo Hu; Vincent K. S. Hsiao; Zhong Lin Wang. 2020. "A highly efficient triboelectric negative air ion generator." Nature Sustainability 4, no. 2: 147-153.
Graphene (Gr)/gold (Au) and graphene-oxide (GO)/Au nanocomposites (NCPs) were synthesized by performing pulsed-laser-induced photolysis (PLIP) on hydrogen peroxide and chloroauric acid (HAuCl4) that coexisted with Gr or GO in an aqueous solution. A 3-month-long aqueous solution stability was observed in the NCPs synthesized without using surfactants and additional processing. The synthesized NCPs were characterized using absorption spectroscopy, transmission electron microscopy, Raman spectroscopy, energy dispersive spectroscopy, and X-ray diffraction to prove the existence of hybrid Gr/Au or GO/Au NCPs. The synthesized NCPs were further evaluated using the photocatalytic reaction of methylene blue (MB), a synthetic dye, under UV radiation, visible light (central wavelength of 470 nm), and full spectrum of solar light. Both Gr/Au and GO/Au NCPs exhibited photocatalytic degradation of MB under solar light illumination with removal efficiencies of 92.1% and 94.5%, respectively.
Li-Hsiou Chen; Huan-Ting Shen; Wen-Hsin Chang; Ibrahim Khalil; Su-Yu Liao; Wageeh A. Yehye; Shih-Chuan Liu; Chih-Chien Chu; Vincent K. S. Hsiao. Photocatalytic Properties of Graphene/Gold and Graphene Oxide/Gold Nanocomposites Synthesized by Pulsed Laser Induced Photolysis. Nanomaterials 2020, 10, 1985 .
AMA StyleLi-Hsiou Chen, Huan-Ting Shen, Wen-Hsin Chang, Ibrahim Khalil, Su-Yu Liao, Wageeh A. Yehye, Shih-Chuan Liu, Chih-Chien Chu, Vincent K. S. Hsiao. Photocatalytic Properties of Graphene/Gold and Graphene Oxide/Gold Nanocomposites Synthesized by Pulsed Laser Induced Photolysis. Nanomaterials. 2020; 10 (10):1985.
Chicago/Turabian StyleLi-Hsiou Chen; Huan-Ting Shen; Wen-Hsin Chang; Ibrahim Khalil; Su-Yu Liao; Wageeh A. Yehye; Shih-Chuan Liu; Chih-Chien Chu; Vincent K. S. Hsiao. 2020. "Photocatalytic Properties of Graphene/Gold and Graphene Oxide/Gold Nanocomposites Synthesized by Pulsed Laser Induced Photolysis." Nanomaterials 10, no. 10: 1985.
We fabricated surface-enhanced Raman scattering (SERS) substrates using gold nanoparticle (AuNP)-decorated zinc oxide (ZnO) nanorods (NRs). Prior to decoration with AuNPs, ZnO NRs on the glass substrate fabricated using the sol–gel method could enhance the SERS signal for detecting 10−5 M rhodamine 6G (R6G). Microscopic analysis revealed that the thermal-annealing process for fabricating the seed layers of ZnO facilitated the growth of ZnO NRs with the highly preferred c-axis (002) orientation. A decrease in the diameter of ZnO NRs occurred because of the use of annealed seek layers further increased the surface-to-volume ratio of ZnO NRs, resulting in an increase in the SERS signal for R6G of 10−5 M. To combine the localized surface plasmon resonance (LSPR) mode with the charge transfer (CT) mode, ZnO NRs were decorated with AuNPs through pulsed-laser-induced photolysis (PLIP). However, the preferred vertical (002) orientation of ZnO NRs was prone to the aggregation of AuNPs, which hindered the SERS signal. The experimental results revealed that ZnO NRs with the crystalline structure of horizontal (100) and (101) orientations facilitated the growth of homogeneous, independent and isolated AuNPs which serves as “hot spots” for SERS signal of detecting R6G at a low concentration of 10−9 M. Comparing to previous fabrication of SERS substrate, our method has advantage to fabricate AuNP-decorated ZnO NR in a short time. Moreover, the optimization of the SERS behaviors for different fabrication conditions of AuNPs using the PLIP method was investigated in detail.
Chia-Man Chou; Le Tran Thanh Thi; Nguyen Thi Quynh Nhu; Su-Yu Liao; Yu-Zhi Fu; Le Vu Tuan Hung; Vincent K. S. Hsiao. Zinc Oxide Nanorod Surface-Enhanced Raman Scattering Substrates without and with Gold Nanoparticles Fabricated through Pulsed-Laser-Induced Photolysis. Applied Sciences 2020, 10, 5015 .
AMA StyleChia-Man Chou, Le Tran Thanh Thi, Nguyen Thi Quynh Nhu, Su-Yu Liao, Yu-Zhi Fu, Le Vu Tuan Hung, Vincent K. S. Hsiao. Zinc Oxide Nanorod Surface-Enhanced Raman Scattering Substrates without and with Gold Nanoparticles Fabricated through Pulsed-Laser-Induced Photolysis. Applied Sciences. 2020; 10 (14):5015.
Chicago/Turabian StyleChia-Man Chou; Le Tran Thanh Thi; Nguyen Thi Quynh Nhu; Su-Yu Liao; Yu-Zhi Fu; Le Vu Tuan Hung; Vincent K. S. Hsiao. 2020. "Zinc Oxide Nanorod Surface-Enhanced Raman Scattering Substrates without and with Gold Nanoparticles Fabricated through Pulsed-Laser-Induced Photolysis." Applied Sciences 10, no. 14: 5015.
We have developed a “green” method for fabricating gold nanoparticles (AuNPs) through biogenic approaches. The proposed method has the advantages of facile preparation under ecofriendly conditions. AuNPs encapsulated in carbon nanosheets, and exhibiting high thermal stability, were fabricated by autoclaving pectin-capped AuNPs, which were subsequently collected through high-speed centrifugation and redispersed in aqueous solution. The 1,1-diphenyl-2-picrylhydrazy (DPPH) radical scavenging assay indicated that our prepared AuNPs exhibited more prolonged antioxidant capacity than pristine apple extracts. Electron paramagnetic resonance (EPR) spectra showed that approximately 80% of DPPH radicals were scavenged by the pectin-capped AuNPs at a concentration of 3 mg/mL. According to our results, AuNPs prepared through biogenic approaches have potential use in the food industry.
Hui-Wen Lin; Jia-Yi Wang; Vincent K. S. Hsiao; Chih-Chien Chu. “Green” Synthesis and Antioxidant Activity of Thermally Stable Gold Nanoparticles Encapsulated in Carbon Nanosheets. Applied Sciences 2020, 10, 2272 .
AMA StyleHui-Wen Lin, Jia-Yi Wang, Vincent K. S. Hsiao, Chih-Chien Chu. “Green” Synthesis and Antioxidant Activity of Thermally Stable Gold Nanoparticles Encapsulated in Carbon Nanosheets. Applied Sciences. 2020; 10 (7):2272.
Chicago/Turabian StyleHui-Wen Lin; Jia-Yi Wang; Vincent K. S. Hsiao; Chih-Chien Chu. 2020. "“Green” Synthesis and Antioxidant Activity of Thermally Stable Gold Nanoparticles Encapsulated in Carbon Nanosheets." Applied Sciences 10, no. 7: 2272.
We investigated a light emitting diode (LED) lighting system applied to a water bamboo field during winter season at night, and the results indicated that this lighting system can prevent the stunting of water bamboo leaves and further assist its growth. Compared with previous LED systems, in which the LED bulbs were placed directly above water bamboo leaves, our LED lighting system presents the benefit of easy handling during harvest. To prevent the inhomogeneous coverage of LED light patterns, a new design of LED lenses was also incorporated.
Vincent K. S. Hsiao; Teng-Yun Cheng; Chih-Feng Chen; Hao Shiu; Yong-Jin Yu; Chun-Fu Tsai; Pin-Chen Lai; Min-Chia Tsai; Chih-Chi Yang; Hung-Yu Chien; Ku-Fan Chen; Yung-Pin Tsai. Optimized LED-Integrated Agricultural Facilities for Adjusting the Growth of Water Bamboo (Zizania latifolia). Applied Sciences 2020, 10, 1330 .
AMA StyleVincent K. S. Hsiao, Teng-Yun Cheng, Chih-Feng Chen, Hao Shiu, Yong-Jin Yu, Chun-Fu Tsai, Pin-Chen Lai, Min-Chia Tsai, Chih-Chi Yang, Hung-Yu Chien, Ku-Fan Chen, Yung-Pin Tsai. Optimized LED-Integrated Agricultural Facilities for Adjusting the Growth of Water Bamboo (Zizania latifolia). Applied Sciences. 2020; 10 (4):1330.
Chicago/Turabian StyleVincent K. S. Hsiao; Teng-Yun Cheng; Chih-Feng Chen; Hao Shiu; Yong-Jin Yu; Chun-Fu Tsai; Pin-Chen Lai; Min-Chia Tsai; Chih-Chi Yang; Hung-Yu Chien; Ku-Fan Chen; Yung-Pin Tsai. 2020. "Optimized LED-Integrated Agricultural Facilities for Adjusting the Growth of Water Bamboo (Zizania latifolia)." Applied Sciences 10, no. 4: 1330.
Metallic film-coated porous silicon (PSi) has been reported as a lucrative surface-enhanced Raman scattering (SERS) substrate. The solution-based fabrication process is facile and easy; however, it requires additional reducing agent and extra chemical treatment, as well as hinders the suitability as a reproducible SERS substrate due to irregular hot spot generation via irregular deposition of metallic nanocrystallites. To address this issue, we report a unique one-step electronic beam (e-beam) physical vapor deposition (PVD) method to fabricate a consistent layer of gold (Au) nanofilm on PSi. Moreover, to achieve the best output as a SERS substrate, PSi prepared by electrochemical etching was used as template to generate an Au layer of irregular surface, offering the surface roughness feature of the PSi–Au thin film. Furthermore, to investigate the etching role and Au film thickness, Au-nanocrystallites of varying thickness (5, 7, and 10 nm) showing discrete surface morphology were characterized and evaluated for SERS effect using Rhodamine 6G (R6G). The SERS signal of R6G adsorbed on PSi–Au thin film showed a marked enhancement, around three-fold enhancement factor (EF), than the Si–Au thin film. The optimal SERS output was obtained for PSi–Au substrate of 7 nm Au film thickness. This study thus indicates that the SERS enhancement relies on the Au film thickness and the roughness feature of the PSi–Au substrate.
Ibrahim Khalil; Chia-Man Chou; Kun-Lin Tsai; Steven Hsu; Wageeh A. Yehye; Vincent K. S. Hsiao. Gold Nanofilm-Coated Porous Silicon as Surface-Enhanced Raman Scattering Substrate. Applied Sciences 2019, 9, 4806 .
AMA StyleIbrahim Khalil, Chia-Man Chou, Kun-Lin Tsai, Steven Hsu, Wageeh A. Yehye, Vincent K. S. Hsiao. Gold Nanofilm-Coated Porous Silicon as Surface-Enhanced Raman Scattering Substrate. Applied Sciences. 2019; 9 (22):4806.
Chicago/Turabian StyleIbrahim Khalil; Chia-Man Chou; Kun-Lin Tsai; Steven Hsu; Wageeh A. Yehye; Vincent K. S. Hsiao. 2019. "Gold Nanofilm-Coated Porous Silicon as Surface-Enhanced Raman Scattering Substrate." Applied Sciences 9, no. 22: 4806.
Correction for ‘A thermal-induced electric current from a gold electrode/porous silicon device’ by Cheng-Yin Huang et al., RSC Adv., 2017, 7, 38677–38681.
Cheng-Yin Huang; Chin-Kai Chang; Kai-Hsin Wen; Vincent K. S. Hsiao. Correction: A thermal-induced electric current from a gold electrode/porous silicon device. RSC Advances 2018, 8, 40595 -40595.
AMA StyleCheng-Yin Huang, Chin-Kai Chang, Kai-Hsin Wen, Vincent K. S. Hsiao. Correction: A thermal-induced electric current from a gold electrode/porous silicon device. RSC Advances. 2018; 8 (71):40595-40595.
Chicago/Turabian StyleCheng-Yin Huang; Chin-Kai Chang; Kai-Hsin Wen; Vincent K. S. Hsiao. 2018. "Correction: A thermal-induced electric current from a gold electrode/porous silicon device." RSC Advances 8, no. 71: 40595-40595.
We demonstrate the electric current measured from a device composed of electrochemically etched silicon, porous silicon (PS) and gold (Au) electrodes of different device designs by applying a thermal potential between two Au electrodes.
Cheng-Yin Huang; Chin-Kai Chang; Kai-Shin Wen; Vincent K. S. Hsiao. A thermal-induced electric current from a gold electrode/porous silicon device. RSC Advances 2017, 7, 38677 -38681.
AMA StyleCheng-Yin Huang, Chin-Kai Chang, Kai-Shin Wen, Vincent K. S. Hsiao. A thermal-induced electric current from a gold electrode/porous silicon device. RSC Advances. 2017; 7 (61):38677-38681.
Chicago/Turabian StyleCheng-Yin Huang; Chin-Kai Chang; Kai-Shin Wen; Vincent K. S. Hsiao. 2017. "A thermal-induced electric current from a gold electrode/porous silicon device." RSC Advances 7, no. 61: 38677-38681.
Chia-Man Chou; Chih-Chang Lai; Chih-Wei Chang; Kai-Hsin Wen; Vincent K. S. Hsiao. Radio-frequency oxygen-plasma-enhanced pulsed laser deposition of IGZO films. AIP Advances 2017, 7, 075309 .
AMA StyleChia-Man Chou, Chih-Chang Lai, Chih-Wei Chang, Kai-Hsin Wen, Vincent K. S. Hsiao. Radio-frequency oxygen-plasma-enhanced pulsed laser deposition of IGZO films. AIP Advances. 2017; 7 (7):075309.
Chicago/Turabian StyleChia-Man Chou; Chih-Chang Lai; Chih-Wei Chang; Kai-Hsin Wen; Vincent K. S. Hsiao. 2017. "Radio-frequency oxygen-plasma-enhanced pulsed laser deposition of IGZO films." AIP Advances 7, no. 7: 075309.
We investigated the electronic properties of pentacene-based organic thin-film transistors (OTFTs) incorporated with an organic dielectric layer (ODL) fabricated using a homemade, cold plasma–enhanced chemical vapor deposition system. Ar-carried trimethylaluminum monomer was introduced into an evaporator mixer controlled at 130 °C, and an ODL was deposited on Si- or indium tin oxide (ITO)–coated plastic substrate under N2 plasma. High radio frequency power (100 W)-deposited ODL (dielectric constant κ = 1.6) supported the fabrication of pentacene-based OTFT on Si substrate at low voltages (< 1.5 V). The decreased deposition time (10 min) reduced the film thickness of the ODL (95 nm), thereby increasing its dielectric constant to 3.3. We also deposited ODL on ITO–coated plastic substrate to fabricate a flexible OTFT with a mobility of 2.1 cm2/Vs and an on/off current ratio (Ion/Ioff) of 103.
C.-M. Chou; C.-W. Chang; K.-H. Wen; Vincent K.S. Hsiao. Plasma-enhanced chemical vapor-deposited organic dielectric layer for low voltage, flexible organic thin-film transistor. Surface and Coatings Technology 2017, 320, 554 -558.
AMA StyleC.-M. Chou, C.-W. Chang, K.-H. Wen, Vincent K.S. Hsiao. Plasma-enhanced chemical vapor-deposited organic dielectric layer for low voltage, flexible organic thin-film transistor. Surface and Coatings Technology. 2017; 320 ():554-558.
Chicago/Turabian StyleC.-M. Chou; C.-W. Chang; K.-H. Wen; Vincent K.S. Hsiao. 2017. "Plasma-enhanced chemical vapor-deposited organic dielectric layer for low voltage, flexible organic thin-film transistor." Surface and Coatings Technology 320, no. : 554-558.
Highlights•Optically switchable LC half-wave plate.•Photoaligned and axially symmetric LC film.•Two azobenzene doped LC system. AbstractWe demonstrate an optically switchable half-wave plate (HWP) composed of a photoaligned and axially symmetric liquid crystal (ASLC) film containing two azobenzene derivatives, methyl red (MR) and 4-butyl-4′-methoxyazobenzene (BMAB). MR is responsible for photoalignment, and BMAB is used for optical tuning and switching the state of polarization (SOP) of probe beam (633 nm He–Ne laser) passing through the MR/BMAB doped ASLC film. The photoaligned ASLC film is first fabricated using a line-shaped laser beam (532 nm) exposure applied on a rotating LC sample. The fabricated ASLC film can passively change the linearly polarized light. Under UV light exposure, the formation of cis-BMAB (bend-like shape) within the film disrupts the LC molecules, switches the LC orientation, and further changes the SOP of the probe beam. Under laser irradiation (532 nm), the formation of trans-BMAB (rod-like shape) reverts the LC orientation back and simultaneously generates cis-MR, helping anchor the LC in the previously photoaligned orientation. The photoaligned MR/BMAB-doped LC HWP can change the linear SOP under alternating UV and visible light exposure.
C.-C. Lin; T.-C. Huang; C.-C. Chu; Vincent K.S. Hsiao. Optically switchable and axially symmetric half-wave plate based on photoaligned liquid crystal films. Optical Materials 2016, 57, 23 -27.
AMA StyleC.-C. Lin, T.-C. Huang, C.-C. Chu, Vincent K.S. Hsiao. Optically switchable and axially symmetric half-wave plate based on photoaligned liquid crystal films. Optical Materials. 2016; 57 ():23-27.
Chicago/Turabian StyleC.-C. Lin; T.-C. Huang; C.-C. Chu; Vincent K.S. Hsiao. 2016. "Optically switchable and axially symmetric half-wave plate based on photoaligned liquid crystal films." Optical Materials 57, no. : 23-27.
The first observation of the photothermoelectric effect in a nanoporous silicon (NPSi) device indicates that the photocurrent is dependent on the position of light‐induced local heating from illumination at the Au‐electrode/NPSi interface.
Yu-Sheng Lai; Chao-Yang Tsai; Chin-Kai Chang; Cheng-Yin Huang; Vincent K. S. Hsiao; Yuhlong Oliver Su. Photothermoelectric Effects in Nanoporous Silicon. Advanced Materials 2016, 28, 2644 -2648.
AMA StyleYu-Sheng Lai, Chao-Yang Tsai, Chin-Kai Chang, Cheng-Yin Huang, Vincent K. S. Hsiao, Yuhlong Oliver Su. Photothermoelectric Effects in Nanoporous Silicon. Advanced Materials. 2016; 28 (13):2644-2648.
Chicago/Turabian StyleYu-Sheng Lai; Chao-Yang Tsai; Chin-Kai Chang; Cheng-Yin Huang; Vincent K. S. Hsiao; Yuhlong Oliver Su. 2016. "Photothermoelectric Effects in Nanoporous Silicon." Advanced Materials 28, no. 13: 2644-2648.
The laser-initiated thermal (optothermal) switching of cholesteric liquid crystals (CLCs) is characterized by using different azobenzene (Azo) derivatives and laser wavelengths. Under 405-nm laser irradiation, Azo-doped CLCs undergo phase transition from cholesteric to isotropic. No cis-to-trans photoisomerization occurs when the 405-nm laser irradiation is blocked because only a single laser is used. The fast response of Azo-doped CLCs under the on–off switching of the 405-nm laser occurs because of the optothermal effect of the system. The 660-nm laser, which cannot be used as irradiation to generate the trans–cis photoisomerization of Azo, is used in Anthraquinone (AQ)-Azo-doped CLCs to examine the optothermal effect of doped Azo. The results show that the LC-like Azo derivative bearing two methyl groups ortho to the Azo moiety (A4) can greatly lower the clearing temperature and generate large amount of heat in AQ-A4-doped CLCs.
Tai-Chieh Huang; Yen-Yu Chen; Chih-Chien Chu; Vincent K. S. Hsiao. Optothermal Switching of Cholesteric Liquid Crystals: A Study of Azobenzene Derivatives and Laser Wavelengths. Materials 2015, 8, 6071 -6084.
AMA StyleTai-Chieh Huang, Yen-Yu Chen, Chih-Chien Chu, Vincent K. S. Hsiao. Optothermal Switching of Cholesteric Liquid Crystals: A Study of Azobenzene Derivatives and Laser Wavelengths. Materials. 2015; 8 (9):6071-6084.
Chicago/Turabian StyleTai-Chieh Huang; Yen-Yu Chen; Chih-Chien Chu; Vincent K. S. Hsiao. 2015. "Optothermal Switching of Cholesteric Liquid Crystals: A Study of Azobenzene Derivatives and Laser Wavelengths." Materials 8, no. 9: 6071-6084.
This work develops an optically controllable all-fiber, radio-frequency phase-shifter based on a side-polished fiber (SPF) overlaid with a photo responsive liquid crystals (LCs). The phase shift of the LC-overlaid SPF (LCSPF) is tuned by modulating the refractive index (RI) of LC, which is determined by the phase transition of the overlaying photo responsive LC that is formed by the trans-cis photoisomerization of doped azobenzene molecules under light illumination. All-optically controllable devices have various advantages over all-electrically controllable devices, including compactness and simplicity of design.
P. C. Peng; V. K. S. Hsiao; T. L. Chang; H. Y. Chen; Y. C. Yu; C. Y. Li; H. H. Lu. Optically controllable all-fiber based radio-frequency phase-shifter. Microwave Photonics (MWP) and the 2014 9th Asia-Pacific Microwave Photonics Conference (APMP) 2014 International Topical Meeting on 2014, 86 -88.
AMA StyleP. C. Peng, V. K. S. Hsiao, T. L. Chang, H. Y. Chen, Y. C. Yu, C. Y. Li, H. H. Lu. Optically controllable all-fiber based radio-frequency phase-shifter. Microwave Photonics (MWP) and the 2014 9th Asia-Pacific Microwave Photonics Conference (APMP) 2014 International Topical Meeting on. 2014; ():86-88.
Chicago/Turabian StyleP. C. Peng; V. K. S. Hsiao; T. L. Chang; H. Y. Chen; Y. C. Yu; C. Y. Li; H. H. Lu. 2014. "Optically controllable all-fiber based radio-frequency phase-shifter." Microwave Photonics (MWP) and the 2014 9th Asia-Pacific Microwave Photonics Conference (APMP) 2014 International Topical Meeting on , no. : 86-88.
This study presents a light-controlled photonic liquid crystal fiber (PLCF) polarization switch. The solid-core PCF has an index-guiding effect that reduces the insertion loss produced by infiltrating liquid crystals (LCs) with a low refractive index (RI). The proposed approach achieves photoactive tuning through the trans–cis photoisomerization of doped azobenzene, which modulates the RI of infiltrated LCs. This design achieves an optically tunable extinction ratio of average 10 dB and photonic bandgap in the wavelength range of 1527–1538 nm under 30 mW laser illumination. The repeatable and switchable phase change is nearly 60°, corresponding to a response time of 100 ms, which is to date the fastest light-tunable PLCF polarization switch available.
Hsin-Rung Lee; Vincent K.S. Hsiao. Photoactive photonic liquid crystal fiber polarization switches. Optical Fiber Technology 2013, 19, 623 -626.
AMA StyleHsin-Rung Lee, Vincent K.S. Hsiao. Photoactive photonic liquid crystal fiber polarization switches. Optical Fiber Technology. 2013; 19 (6):623-626.
Chicago/Turabian StyleHsin-Rung Lee; Vincent K.S. Hsiao. 2013. "Photoactive photonic liquid crystal fiber polarization switches." Optical Fiber Technology 19, no. 6: 623-626.
A fiber-optic violet sensor is demonstrated by using the surface grating formed by a photosensitive liquid crystal (LC) hybrid film on the flat area of side-polished fiber (SPF). The surface grating is constructed through a periodic intensity illuminating the hybrid LC film, where the periodic intensity is created by a phase mask through which the violet light passes. Experiment shows that a loss peak appears in the transmission spectrum between 1520 and 1620 nm, and this loss peak shifts toward shorter wavelength as the 405 nm light power increases. The wavelength shift of the peak shows very good linearity with the irradiation power between 30 and 80 mW cm−2. The very high sensitivity of the light power sensor is measured to be 1.154 nm (mW cm−2)−1, which implies that the minimum change of power intensity that can be detected is 0.866 µW cm−2 for this sensor under the limited wavelength resolution of 0.001 nm of the optical spectrum analyzer. For UV light, much higher sensitivity will be further obtained, as the LC hybrid is more sensitive to UV light than to violet light.
Jianhui Yu; Haozhi Li; Vincent Hsiao; Weiping Liu; Jieyuan Tang; Yanfang Zhai; Yao Du; Jun Zhang; Yi Xiao; Zhe Chen. A fiber-optic violet sensor by using the surface grating formed by a photosensitive hybrid liquid crystal film on side-polished fiber. Measurement Science and Technology 2013, 24, 094019 .
AMA StyleJianhui Yu, Haozhi Li, Vincent Hsiao, Weiping Liu, Jieyuan Tang, Yanfang Zhai, Yao Du, Jun Zhang, Yi Xiao, Zhe Chen. A fiber-optic violet sensor by using the surface grating formed by a photosensitive hybrid liquid crystal film on side-polished fiber. Measurement Science and Technology. 2013; 24 (9):094019.
Chicago/Turabian StyleJianhui Yu; Haozhi Li; Vincent Hsiao; Weiping Liu; Jieyuan Tang; Yanfang Zhai; Yao Du; Jun Zhang; Yi Xiao; Zhe Chen. 2013. "A fiber-optic violet sensor by using the surface grating formed by a photosensitive hybrid liquid crystal film on side-polished fiber." Measurement Science and Technology 24, no. 9: 094019.
This paper presents large-angle color dispersion using a holographically fabricated 2-D subwavelength transmission grating. A dispersion angle of 68° is observed within continuous spectrum dispersion from 360 to 700 nm at an incident angle of 20 ° using white light as a probe beam. By changing the angle between the sample normal and the probe beam, the dispersed spectrum can be tuned at a spectral resolution of 3.6 nm per degree.
Ya-Yun Lo; Jianhui Yu; Yu-Chuan Su; V. K. S. Hsiao; Zhe Chen. Large-Angle Color Dispersion Based on 2-D Hexagonal Subwavelength Holographic Gratings. IEEE Photonics Journal 2013, 5, 2220504 -2220504.
AMA StyleYa-Yun Lo, Jianhui Yu, Yu-Chuan Su, V. K. S. Hsiao, Zhe Chen. Large-Angle Color Dispersion Based on 2-D Hexagonal Subwavelength Holographic Gratings. IEEE Photonics Journal. 2013; 5 (2):2220504-2220504.
Chicago/Turabian StyleYa-Yun Lo; Jianhui Yu; Yu-Chuan Su; V. K. S. Hsiao; Zhe Chen. 2013. "Large-Angle Color Dispersion Based on 2-D Hexagonal Subwavelength Holographic Gratings." IEEE Photonics Journal 5, no. 2: 2220504-2220504.
Azobenzene-impregnated porous silicon (azo-PS) was used, for the first time, as a color-rewritable organic/inorganic hybrid material. Under UV light illumination, the generation of cis-azo enhances the red photoluminescence (PL) emission. Images can be written and erased under external light and thermal stimuli.
Sheng-Lin Chen; Chih-Chien Chu; Vincent Hsiao. Reversible light-modulated photoluminescence from azobenzene-impregnated porous silicon. Journal of Materials Chemistry C 2013, 1, 3529 .
AMA StyleSheng-Lin Chen, Chih-Chien Chu, Vincent Hsiao. Reversible light-modulated photoluminescence from azobenzene-impregnated porous silicon. Journal of Materials Chemistry C. 2013; 1 (22):3529.
Chicago/Turabian StyleSheng-Lin Chen; Chih-Chien Chu; Vincent Hsiao. 2013. "Reversible light-modulated photoluminescence from azobenzene-impregnated porous silicon." Journal of Materials Chemistry C 1, no. 22: 3529.
In this study, we compared the crystalline structures, optical properties, and surface morphologies of ZnO thin films deposited on silicon and glass substrates by conventional pulsed laser deposition (PLD) and radio-frequency (RF) plasma-enhanced PLD (RF-PEPLD). The depositions were performed at room temperature under 30–100 mTorr pressure conditions. The RF-PEPLD process was found to have deposited a ZnO structure with preferred (0 0 2) c-axis orientation at a higher deposition rate; however, the RF-PEPLD process generated more defects in the thin films. The application of oxygen pressure to the RF-PEPLD process reduced defects effectively and also increased the deposition rate.
S.-H. Huang; Y.-C. Chou; C.-M. Chou; Vincent K S Hsiao. Room temperature radio-frequency plasma-enhanced pulsed laser deposition of ZnO thin films. Applied Surface Science 2012, 266, 194 -198.
AMA StyleS.-H. Huang, Y.-C. Chou, C.-M. Chou, Vincent K S Hsiao. Room temperature radio-frequency plasma-enhanced pulsed laser deposition of ZnO thin films. Applied Surface Science. 2012; 266 ():194-198.
Chicago/Turabian StyleS.-H. Huang; Y.-C. Chou; C.-M. Chou; Vincent K S Hsiao. 2012. "Room temperature radio-frequency plasma-enhanced pulsed laser deposition of ZnO thin films." Applied Surface Science 266, no. : 194-198.