A5010294958- Gold and Silver Nanoparticles Synthesis and Applications
- Plasmonic and Surface Plasmon Research
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Photonic Crystals and Applications
- Nonlinear Optical Materials Studies
- Nanomaterials and Printing Technologies
- Nanofabrication and Lithography Techniques
- Copper-based nanomaterials and applications
- Photochromic and Fluorescence Chemistry
- Pigment Synthesis and Properties
- Nanotechnology research and applications
- ZnO doping and properties
- Dielectric materials and actuators
- Protein Interaction Studies and Fluorescence Analysis
- Advanced Materials and Mechanics
- Image Enhancement Techniques
- Dielectric properties of ceramics
- Additive Manufacturing and 3D Printing Technologies
- Ferroelectric and Piezoelectric Materials
- Thermal Radiation and Cooling Technologies
- Lanthanide and Transition Metal Complexes
- Strong Light-Matter Interactions
- Optical Coatings and Gratings
- Color Science and Applications
Singapore University of Technology and Design
2023-2025
National University of Singapore
2020-2023
Indian Institute of Technology Roorkee
2016
Indian Institute of Science Bangalore
2015
Bangalore University
2015
Two-photon polymerization lithography is promising for producing three-dimensional structures with user-defined micro- and nanoscale features. Additionally, shrinkage by thermolysis can readily shorten the lattice constant of photonic crystals enhance their resolution mechanical properties; however, this technique suffers from non-uniform owing to substrate pinning during heating. Here, we develop a simple method using poly(vinyl alcohol)-assisted uniform shrinking printed structures....
Optical microcavities are widely used to confine photons for exciton-polariton formation. However, their compact design often imposes limitations on spatial freedom, particularly in controlling the cavity length with nanometer precision required effective coupling excitons. Existing methods tuning resonances by integrating cavities dynamic structures lack sufficient resolution or a complex operation. Here, we introduce multiresonant microcavity array that provides full spectral selection of...
Thermoelectric photodetectors are robust alternatives to photodiodes with applications in extreme environments; however, the poor absorptivity of thermoelectric materials limits their photosensitivity. Here, we take a new look at traditional Sb2Te3 and Bi2Te3 recently discovered ability support interband plasmonic resonances visible spectrum. We fabricated nanoresonators directly into improve optical absorptance through field enhancements, leading improved photo-thermoelectric conversion. A...
Efforts to increase the number of filters are driven by demand for miniaturized spectrometers and multispectral imaging. However, processes that rely on sequential fabrication each filter cost ineffective. Herein, we introduce an approach produce at least 16 distinct based a single low-resolution lithographic step with minimum feature size 0.6 μm. Distinct from grayscale lithography, employ standard binary lithography but achieve height variations in polymeric resist through post-development...
Multiwall carbon nanotubes (MWNTs) were anchored onto graphene oxide sheets (GOs)<italic>via</italic>diazonium and C–C coupling reactions characterized by spectroscopic electron microscopic techniques.
The oriented attachment (OA) of 0D semiconductor nanocrystals into 1D and 2D nanostructures with unique properties is useful for the fabrication quantum confined nanomaterials that are otherwise difficult to produce by direct synthesis. Given OA such as nanorods generally produces linear chains, rod-couple structures, or clustered columns, linking them in a facet-specific manner structures challenging. Here, we report Cu2-xS undergo etching on exposure hexylphosphonic acid under mild...
Two-photon polymerisation lithography enables the three-dimensional (3D)-printing of high-resolution micron-and nano-scale structures.Structures that are 3D-printed using proprietary resins transparent and suitable as optical components.However, achieving a mix opaque structures in single component is challenging requires multiple material systems or manual introduction ink after fabrication.In this study, we investigated an overexposure printing process for laser decomposition, which...
The structural color properties of colloidal arrays can be controlled by assembly via tuning the size, composition, and ordering particles their formation at macroscale. Controlled patterning offer many advantages for technological development photovoltaics, optics, lab-on-a-chip, where influence functions a system. Many techniques have been well established ordered (colloidal crystals), disordered glasses). However, they are time-consuming require additional steps such as masking, etching,...
Branched heterostructured semiconductor nanoparticles such as core seeded tetrapods and octapods offer properties not seen in their spherical core-shell counterparts, but are challenging to synthesize with a large diversity of branch numbers via heterogeneous nucleation growth processes alone. This work describes process facet-link matchstick-like Ag2S-tipped ZnS nanorods Ag2S tips, producing branched Ag2S-centered bipods, tripods, general multipods 4 16 arms function reaction time. The...
Tunable structural colors have a multitude of applications in the beautification mobile devices, decoration artwork, and creation color filters. In this paper, we describe Metal-Insulator-Metal (MIM) design that can be used to systematically tune by altering thickness top metal intermediate insulator. Cu Si3N4 were selected as insulator layers, respectively, various reflection printed on Al. To protect surface from scratchiness oxidation, number capping including SiO2, LPSQ, PMMA,...
Emerging quantum technologies that critically require the integration of emitters on photonic platforms are hindered by control over their position, quantity, and scalability. Herein, we describe a facile strategy to deposit aqueous silica-coated dots (QDs) in template polymethyl methacrylate (PMMA) nanoholes leverages saturated ethanol vapor drop-casting subsequent lift-off template. Ethanol incorporation into water droplets during drying process reduces meniscus contact angle, which...
Precise control over the composition of heterostructure nanocrystals and their self-assembly is an emerging research interest. Superstructures this type are typically enhanced in terms collective functionalities. Herein, we developed a practical yet simple approach to synthesize self-assemble Cu2–xS/CuYS (Y = In, Sb, Sn) heterostructured nanorods (NRs) into vertically standing up assemblies. First NRs come together via depletion–attraction forces, then partial cation exchange between Cu31S16...