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Photochargeable supercapacitors enable the storage of light-induced electrochemical energy. A few layers of graphene and MXene (Ti3C2Tx) quantum dots (QDs) are composited in this work for large photochargeable supercapacitor electrodes. Planar graphene allows overcoming limitations of charge carrier scattering, and MXene QDs on the surface facilitate an efficient light interaction Read more…
Ammonia gas has been recognized by the United States Environmental Protection Agency(USEPA) as one of the primary gases that are detrimental to conserving air quality. As such, trace levels of ammonia must be detected in any quality-controlled atmospheric conditions, such as space stations, manned space vehicles, submarines, healthcare facilities, pharmaceutical Read more…
Photo-chargeable supercapacitors are attracting significant research interest as promising alternative to energy storage devices suitable for next-generation smart appliances. In this work, a heterojunction of cadmium sulphide (CdS) nanoparticles and zinc oxide (ZnO) nanorods is obtained for designing a broadband photo responsive symmetrical supercapacitor. Ultraviolet (UV) absorption by ZnO and Read more…
Integration of nano- and micro-structured materials with the tip of optical fibers is one of the integral parts of making lab-on-fiber technology for sensing applications. Optical fiber tips have been previously patterned using e-beam lithography, focused ion beam milling, 3D direct laser writing, CVD/PVD processing, direct transfer of nanomaterials from Read more…
We demonstrate a cost-efficient technique to fabricate diffraction gratings using colloidal nanoparticles and capillary-assisted self-assembly process on a flexible substrate. Through experiments, finite difference time-domain simulations (FDTD), and Rigorous Coupled-Wave Analysis (RCWA) we show that the gratings exhibit enhanced diffraction efficiency in the first order when compared to air-polymer gratings. Read more…
We demonstrate a cost-effective and high-throughput fabrication technique to deposit colloidal nanoparticles on a patterned polymer substrate using a capillary-assisted self-assembly method over a large area. In particular, we fabricate optical gratings using gold nanoparticles and a polymer substrate. We show the versatility of the technique over different nanoparticle diameters Read more…