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The nonintrusive, realtime, and accurate measurement of the local temperature has applications in a variety of scenarios. This need has led to significant research to develop novel nanophotonic sensors. In this paper, a 3D-printed optofluidic chip is nano-engineered for local, contactless, and precise optical measurement of temperature in microfluidic channels using lanthanide-doped upconversion nanoparticles. Temperature sensing nano-emitters are doped in a UV-curable matrix and embedded into a microfluidic channel using maskless photolithography. Photoluminescence of NaYF4:Yb3+, Er3+ upconversion nanoparticles have two bands in the green spectrum in which the PL maximums at 521 nm and 541 nm are used for temperature sensing. Thus, enabling ratiometric temperature sensing when excited using near-infrared light, which is desirable for measurements in biological and biomedical settings. The functionality of the temperature sensor for local and nonintrusive measurements in a microalgae culture medium is demonstrated.
Mahsa Habibi; Pooya Bagheri; Nahid Ghazyani; Hossein Zare-Behtash; Esmaeil Heydari. 3D printed optofluidic biosensor: NaYF4: Yb3+, Er3+ upconversion nano-emitters for temperature sensing. Sensors and Actuators A: Physical 2021, 326, 112734 .
AMA StyleMahsa Habibi, Pooya Bagheri, Nahid Ghazyani, Hossein Zare-Behtash, Esmaeil Heydari. 3D printed optofluidic biosensor: NaYF4: Yb3+, Er3+ upconversion nano-emitters for temperature sensing. Sensors and Actuators A: Physical. 2021; 326 ():112734.
Chicago/Turabian StyleMahsa Habibi; Pooya Bagheri; Nahid Ghazyani; Hossein Zare-Behtash; Esmaeil Heydari. 2021. "3D printed optofluidic biosensor: NaYF4: Yb3+, Er3+ upconversion nano-emitters for temperature sensing." Sensors and Actuators A: Physical 326, no. : 112734.
The two complementary technologies of colloidal upconverting nano-emitters and maskless photolithography are exploited to fabricate nano-engineered optically-active surfaces for anti-counterfeiting applications based on multiphoton absorption phenomenon in lanthanide nanocomposites with a visualization wavelength in the NIR. It is demonstrated that the unique optical, thermal, and temporal characteristics of these versatile upconverting surface distinguishes them from their counterparts. A unique behaviour that is captured is the ability to actively tune their emission color by modifying the pumping power, temperature, and excitation frequency. A new low-cost negative photoresist is employed for implementation of maskless photolithography of single and double-color labels using two efficient upconverting nanocomposites based on NaYF4:Yb3+,Er3+ and NaYF4:Yb3+,Tm3+ nano-emitters. What’s more, it is shown that the detectability of the proposed anti-counterfeiting approach can be carried out using just a smartphone. Each of the emission peaks of the upconversion nanoparticles is associated with a different multiphoton absorption mechanism and their thermosensitivity varies from one peak to another. Furthermore, their photoluminescent color changes by scanning the excitation beam impinging on the surfaces comprised of both upconversion nanoparticles doped in the UV-curable resist. Longterm photostability of these surfaces under continuous excitation by a high power laser makes them a promising nano-emitters for the next generation of anti-counterfeiting labels.
Fatemeh Kaboli; Nahid Ghazyani; Mohammadreza Riahi; Hossein Zare-Behtash; Mohammad Hossein Majles Ara; Esmaeil Heydari. Upconverting Nanoengineered Surfaces: Maskless Photolithography for Security Applications. ACS Applied Nano Materials 2019, 2, 3590 -3596.
AMA StyleFatemeh Kaboli, Nahid Ghazyani, Mohammadreza Riahi, Hossein Zare-Behtash, Mohammad Hossein Majles Ara, Esmaeil Heydari. Upconverting Nanoengineered Surfaces: Maskless Photolithography for Security Applications. ACS Applied Nano Materials. 2019; 2 (6):3590-3596.
Chicago/Turabian StyleFatemeh Kaboli; Nahid Ghazyani; Mohammadreza Riahi; Hossein Zare-Behtash; Mohammad Hossein Majles Ara; Esmaeil Heydari. 2019. "Upconverting Nanoengineered Surfaces: Maskless Photolithography for Security Applications." ACS Applied Nano Materials 2, no. 6: 3590-3596.
This study presents an alternative experimental strategy for the colorimetric biodetection based on modulation of the bright-field color of nano-engineered Au-chips through plasmonic coupling instead of conventional detection based on dark-field imaging in colloidal solutions. In this approach, not only the optical detection system is simplified such that it does not require a dark-field condenser lens and precise optical alignment but also the formation of plasmonic colored letters using dip-pen nanolithography makes the proposed strategy a promising candidate for smartphone-based detection and facilitates the detection process by untrained users. For this purpose, e-beam lithography was employed for precise fabrication of the nanoplasmonic chips as solid binding sites comprising gold nano-disks with 120 nm diameter and 25 nm thickness. Dip-pen nanolithography enabled the microscale patterning of probes onto its surface. A color change is induced by plasmonic coupling between silver nanoparticle labels and the gold nano-disk-binding sites, which can be verified by surface-enhanced Raman spectroscopy. Sensitivity investigation shows that at least 150 Ag-nanoparticles are required to observe the bright-field colorimetric change. Dip-pen printing of a noncomplementary probe alongside a complementary probe demonstrates the selectivity of the detection. Patterning of the probes onto the plasmonic surface in the form of a letter in addition to the compatibility of this technology with smartphone platforms for imaging makes this technique desirable for future biomedical applications.
Esmaeil Heydari. Nanoplasmonic biodetection based on bright-field imaging of resonantly coupled gold-silver nanoparticles. Photonics and Nanostructures - Fundamentals and Applications 2019, 36, 100708 .
AMA StyleEsmaeil Heydari. Nanoplasmonic biodetection based on bright-field imaging of resonantly coupled gold-silver nanoparticles. Photonics and Nanostructures - Fundamentals and Applications. 2019; 36 ():100708.
Chicago/Turabian StyleEsmaeil Heydari. 2019. "Nanoplasmonic biodetection based on bright-field imaging of resonantly coupled gold-silver nanoparticles." Photonics and Nanostructures - Fundamentals and Applications 36, no. : 100708.
Plasmonic color filtering has provided a range of new techniques for “printing” images at resolutions beyond the diffraction-limit, significantly improving upon what can be achieved using traditional, dye-based filtering methods. Here, a new approach to high-density data encoding is demonstrated using full color, dual-state plasmonic nanopixels, doubling the amount of information that can be stored in a unit-area. This technique is used to encode two data sets into a single set of pixels for the first time, generating vivid, near-full sRGB (standard Red Green Blue color space)color images and codes with polarization-switchable information states. Using a standard optical microscope, the smallest “unit” that can be read relates to 2 × 2 nanopixels (370 nm × 370 nm). As a result, dual-state nanopixels may prove significant for long-term, high-resolution optical image encoding, and counterfeit-prevention measures.
Esmaeil Heydari; Justin Ryan Sperling; Steven L. Neale; Alasdair W. Clark. Plasmonic Color Filters as Dual-State Nanopixels for High-Density Microimage Encoding. Advanced Functional Materials 2017, 27, 1 .
AMA StyleEsmaeil Heydari, Justin Ryan Sperling, Steven L. Neale, Alasdair W. Clark. Plasmonic Color Filters as Dual-State Nanopixels for High-Density Microimage Encoding. Advanced Functional Materials. 2017; 27 (35):1.
Chicago/Turabian StyleEsmaeil Heydari; Justin Ryan Sperling; Steven L. Neale; Alasdair W. Clark. 2017. "Plasmonic Color Filters as Dual-State Nanopixels for High-Density Microimage Encoding." Advanced Functional Materials 27, no. 35: 1.
We demonstrate plasmonically nano-engineered coherent random lasing and stimulated emission enhancement in a hybrid gain medium of organic semiconductors doped with core–shell plasmonic nanoparticles.
Esmaeil Heydari; Isabel Pastoriza-Santos; Luis M. Liz-Marzán; Joachim Stumpe. Nanoplasmonically-engineered random lasing in organic semiconductor thin films. Nanoscale Horizons 2017, 2, 261 -266.
AMA StyleEsmaeil Heydari, Isabel Pastoriza-Santos, Luis M. Liz-Marzán, Joachim Stumpe. Nanoplasmonically-engineered random lasing in organic semiconductor thin films. Nanoscale Horizons. 2017; 2 (5):261-266.
Chicago/Turabian StyleEsmaeil Heydari; Isabel Pastoriza-Santos; Luis M. Liz-Marzán; Joachim Stumpe. 2017. "Nanoplasmonically-engineered random lasing in organic semiconductor thin films." Nanoscale Horizons 2, no. 5: 261-266.
Esmaeil Heydari; Samuel Mabbott; David Thompson; Duncan Graham; Jonathan M. Cooper; Alasdair W. Clark. Engineering molecularly-active nanoplasmonic surfaces for DNA detection via colorimetry and Raman scattering. Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XIII 2016, 972105 -972105-6.
AMA StyleEsmaeil Heydari, Samuel Mabbott, David Thompson, Duncan Graham, Jonathan M. Cooper, Alasdair W. Clark. Engineering molecularly-active nanoplasmonic surfaces for DNA detection via colorimetry and Raman scattering. Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XIII. 2016; ():972105-972105-6.
Chicago/Turabian StyleEsmaeil Heydari; Samuel Mabbott; David Thompson; Duncan Graham; Jonathan M. Cooper; Alasdair W. Clark. 2016. "Engineering molecularly-active nanoplasmonic surfaces for DNA detection via colorimetry and Raman scattering." Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XIII , no. : 972105-972105-6.
We demonstrate tunable, polarization-dependent, dual-color plasmonic filters based upon arrays of asymmetric cross-shaped nano-apertures. Acting as individual color emitting nano-pixels, each aperture can selectively transmit one of 2 colors, switched by controlling the polarization of white-light incident on the rear of each pixel. By tuning the dimensions of the pixels we build a polarization sensitive color palette at resolutions far beyond the diffraction limit. Using this switchable color palette we are able to generate complex optical surfaces encoded with dual color and information states; allowing us to embed two color images within the same unit area, using the same set of nanoapertures. © (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Esmaeil Heydari; Zhibo Li; Jonathan M. Cooper; Alasdair W. Clark. Polarization switchable two-color plasmonic nano-pixels for creating optical surfaces encoded with dual information states. Photonic and Phononic Properties of Engineered Nanostructures VI 2016, 9756, 975619 .
AMA StyleEsmaeil Heydari, Zhibo Li, Jonathan M. Cooper, Alasdair W. Clark. Polarization switchable two-color plasmonic nano-pixels for creating optical surfaces encoded with dual information states. Photonic and Phononic Properties of Engineered Nanostructures VI. 2016; 9756 ():975619.
Chicago/Turabian StyleEsmaeil Heydari; Zhibo Li; Jonathan M. Cooper; Alasdair W. Clark. 2016. "Polarization switchable two-color plasmonic nano-pixels for creating optical surfaces encoded with dual information states." Photonic and Phononic Properties of Engineered Nanostructures VI 9756, no. : 975619.
We report a versatile nanophotonic biosensing platform that enables both colorimetric detection and enhanced Raman spectroscopy detection of molecular binding events. Through the integration of electron-beam lithography, dip-pennanolithography and molecular self-assembly, we demonstrate plasmonic nanostructures which change geometry and plasmonic properties in response to molecularly-mediated nanoparticle binding events. These biologically-active nanostructured surfaces hold considerable potential for use as multiplexed sensor platforms for point-of-care diagnostics, and as scaffolds for a new generation of molecularly dynamic metamaterials.
Esmaeil Heydari; David Thompson; Duncan Graham; Jonathan M. Cooper; Alasdair W. Clark. An engineered nano-plasmonic biosensing surface for colorimetric and SERS detection of DNA-hybridization events. Plasmonics in Biology and Medicine XII 2015, 9340, 93400O .
AMA StyleEsmaeil Heydari, David Thompson, Duncan Graham, Jonathan M. Cooper, Alasdair W. Clark. An engineered nano-plasmonic biosensing surface for colorimetric and SERS detection of DNA-hybridization events. Plasmonics in Biology and Medicine XII. 2015; 9340 ():93400O.
Chicago/Turabian StyleEsmaeil Heydari; David Thompson; Duncan Graham; Jonathan M. Cooper; Alasdair W. Clark. 2015. "An engineered nano-plasmonic biosensing surface for colorimetric and SERS detection of DNA-hybridization events." Plasmonics in Biology and Medicine XII 9340, no. : 93400O.
A monolithic active optical resonator biosensor is fabricated for label-free sensing. The all-polymer sensor consists of a polymer distributed feedback (DFB) laser and a hydrogel recognition layer. Specific binding of analyte modulates the effective refractive index, shifting the laser emission wavelength. Real time detection of avidinbiotin interactions is demonstrated as a model for the new label-free biosensing principle
Esmaeil Heydari; Jens Buller; Erik Wischerhoff; André Laschewsky; Sebastian Döring; Joachim Stumpe. Label-Free Biosensor Based on an All-Polymer DFB Laser. Advanced Optical Materials 2014, 2, 137 -141.
AMA StyleEsmaeil Heydari, Jens Buller, Erik Wischerhoff, André Laschewsky, Sebastian Döring, Joachim Stumpe. Label-Free Biosensor Based on an All-Polymer DFB Laser. Advanced Optical Materials. 2014; 2 (2):137-141.
Chicago/Turabian StyleEsmaeil Heydari; Jens Buller; Erik Wischerhoff; André Laschewsky; Sebastian Döring; Joachim Stumpe. 2014. "Label-Free Biosensor Based on an All-Polymer DFB Laser." Advanced Optical Materials 2, no. 2: 137-141.
Esmaeil Heydari; Isabel Pastoriza-Santos; Roman Flehr; Luis M. Liz-Marzán; Joachim Stumpe. Nanoplasmonic Enhancement of the Emission of Semiconductor Polymer Composites. The Journal of Physical Chemistry C 2013, 117, 16577 -16583.
AMA StyleEsmaeil Heydari, Isabel Pastoriza-Santos, Roman Flehr, Luis M. Liz-Marzán, Joachim Stumpe. Nanoplasmonic Enhancement of the Emission of Semiconductor Polymer Composites. The Journal of Physical Chemistry C. 2013; 117 (32):16577-16583.
Chicago/Turabian StyleEsmaeil Heydari; Isabel Pastoriza-Santos; Roman Flehr; Luis M. Liz-Marzán; Joachim Stumpe. 2013. "Nanoplasmonic Enhancement of the Emission of Semiconductor Polymer Composites." The Journal of Physical Chemistry C 117, no. 32: 16577-16583.
Esmaeil Heydari; Roman Flehr; Joachim Stumpe. Influence of spacer layer on enhancement of nanoplasmon-assisted random lasing. Applied Physics Letters 2013, 102, 133110 .
AMA StyleEsmaeil Heydari, Roman Flehr, Joachim Stumpe. Influence of spacer layer on enhancement of nanoplasmon-assisted random lasing. Applied Physics Letters. 2013; 102 (13):133110.
Chicago/Turabian StyleEsmaeil Heydari; Roman Flehr; Joachim Stumpe. 2013. "Influence of spacer layer on enhancement of nanoplasmon-assisted random lasing." Applied Physics Letters 102, no. 13: 133110.
Photoluminescence enhancement of CdSe/CdS/ZnS QDs by localized surface plasmon resonance of large Au-NPs has been investigated. The photoluminescence of the QDs with an emission wavelength at 620 nm in a PMMA matrix is enhanced by immobilized Au-NPs. By considering the lifetime and excitation dependent photoluminescence we realized that the emission and excitation rate enhancements both contributed to the total photoluminescence enhancement. PL measurements were carried out for different sizes of Au-NPs to find out their influences on the emission of QDs. The largest enhancement is achieved by applying 80 nm Au-NPs. Silanization method gives us the opportunity easily to prepare samples with different concentrations of Au-NPs. It is revealed that increasing the concentration of the Au-NPs layer provides higher scattering cross section which contributes in PL enhancement.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Esmaeil Heydari; Tonino Greco; Joachim Stumpe. Enhancement of QDs photoluminescence by localized surface plasmon effect of Au-NPs. Photonics Europe 2012, 8424, 842436 -842436.
AMA StyleEsmaeil Heydari, Tonino Greco, Joachim Stumpe. Enhancement of QDs photoluminescence by localized surface plasmon effect of Au-NPs. Photonics Europe. 2012; 8424 ():842436-842436.
Chicago/Turabian StyleEsmaeil Heydari; Tonino Greco; Joachim Stumpe. 2012. "Enhancement of QDs photoluminescence by localized surface plasmon effect of Au-NPs." Photonics Europe 8424, no. : 842436-842436.
Esmaeil Heydari; Ezeddin Mohajerani; A. Shams. All optical switching in azo-polymer planar waveguide. Optics Communications 2011, 284, 1208 -1212.
AMA StyleEsmaeil Heydari, Ezeddin Mohajerani, A. Shams. All optical switching in azo-polymer planar waveguide. Optics Communications. 2011; 284 (5):1208-1212.
Chicago/Turabian StyleEsmaeil Heydari; Ezeddin Mohajerani; A. Shams. 2011. "All optical switching in azo-polymer planar waveguide." Optics Communications 284, no. 5: 1208-1212.
In this paper we present our studies of optical switching process in planar azo-dye Methyl Red doped polymeric waveguides by using an Ar ion laser (488 nm) as pump beam and a He-Ne laser (633) as probe beam. The effects of different parameters on optical switching process and effects of probe and pump beams on absorption spectrum of sample were studied experimentally. The switching process is attributed to trans-cis photoisomerization of azodyes followed by cis-trans thermal or optical relaxation that induces a reversible birefringence and dichroism in dye-doped polymeric waveguides when pumped with polarized light.
Ezeddin Mohajerani; Esmaeil Heydari. Trans-cis-trans photoisomerization as an all-optical switching in azo-dye-doped polymer waveguide. Photonics Asia 2007 2007, 682818 -682818-8.
AMA StyleEzeddin Mohajerani, Esmaeil Heydari. Trans-cis-trans photoisomerization as an all-optical switching in azo-dye-doped polymer waveguide. Photonics Asia 2007. 2007; ():682818-682818-8.
Chicago/Turabian StyleEzeddin Mohajerani; Esmaeil Heydari. 2007. "Trans-cis-trans photoisomerization as an all-optical switching in azo-dye-doped polymer waveguide." Photonics Asia 2007 , no. : 682818-682818-8.