A5065897977- Quantum Dots Synthesis And Properties
- Advanced biosensing and bioanalysis techniques
- Nanocluster Synthesis and Applications
- Chalcogenide Semiconductor Thin Films
- Phosphorus and nutrient management
- Advanced battery technologies research
- Nanoparticles: synthesis and applications
- Carbon and Quantum Dots Applications
- Biosensors and Analytical Detection
- Polymer-Based Agricultural Enhancements
- Fuel Cells and Related Materials
- Click Chemistry and Applications
- Nanoparticle-Based Drug Delivery
- Perovskite Materials and Applications
- Copper-based nanomaterials and applications
- Phytase and its Applications
- Conducting polymers and applications
- Solid-state spectroscopy and crystallography
- Recycling and utilization of industrial and municipal waste in materials production
- Fullerene Chemistry and Applications
- TiO2 Photocatalysis and Solar Cells
- Monoclonal and Polyclonal Antibodies Research
- Coal and Its By-products
- Cancer Treatment and Pharmacology
- Graphene and Nanomaterials Applications
Department of Biotechnology
2016-2023
Energy and Resources Institute
2021-2023
Shree Guru Gobind Singh Tricentenary University
2023
TERI University
2016-2022
Indian Institute of Technology Delhi
2010-2016
Shell (United States)
2001
Core/intermediate/shell (C/I/S) structures with Type-I emission are well-known and gaining immense importance due to their superior luminescence properties. Here, we report a unique C/I/S structure composed of CdSe/CdS/ZnSe that exhibits both Type-II phenomena. The have been well characterized using combination optical structural techniques. photoluminescence (PL) excitation (PLE) data indicate the formation combined in one material, results supported by simple theoretical calculations....
We report a systematic study of the electron-transfer process from CdSe quantum dots (QDs) to Au tips as function QD diameter and also size Au-tip. For Au-tips smaller than ∼3 nm, that is, when they are still not metallic, reduction in PL behavior is observed excited electrons transferred QD-conduction band Au, with quenching being higher for larger QDs. A combination steady state time-resolved studies establish mechanism charge transfer further confirmed by dye-degradation studies, showing...
Excess urea fertilizer application to the agricultural fields causes severe environmental deterioration. Researchers actively seek safer alternatives, such as nanoparticles with unique properties, reduce chemical inputs without compromising output. In present study, three variants─hydroxyapatite–urea, magnesium-doped hydroxyapatite–urea, and zinc-doped hydroxyapatite–urea nanohybrids─have been synthesized in a two-step method characterized slow-release nitrogen fertilizers. Doping Zn Mg...
We present results of the studies relating to preparation Langmuir–Blodgett (LB) monolayers tri-n-octylphosphine oxide-capped cadmium selenide quantum dots (QCdSe) onto indium–tin oxide (ITO) coated glass substrate. The monolayer behavior has been studied at air–water interface under various subphase conditions. This nanopatterned platform explored fabricate an electrochemical DNA biosensor for detection chronic myelogenous leukemia (CML) by covalently immobilizing thiol-terminated...
We show for the first time that stability of wurtzite or zinc blende phase CdE (E = S, Se, Te) nanocrystals strongly depends on surface these nanocrystals. Anion rich surfaces prefer to crystallize in structure whereas cation tend favor phase. Transformations from one other can be effected by merely changing particles and annealing at a specified temperature. Our results it is not only important choose synthesis temperature ligands order achieve crystallization preferred but also deciding factor.
The ongoing and unrestrained application of nitrogen fertilizer to agricultural lands has been directly linked climate change reductions in biodiversity. sector needs a technological upgrade adopt sustainable methods for maintaining high yield. We report synthesis zinc magnesium doped undoped hydroxyapatite nanoparticles, their urea nanohybrids, sustainably deliver wheat. nanohybrids loaded with up 42% were used as new source compared conventional urea-based efficient sufficient delivery...
The role of surface atoms on the emission from core−shell nanocrystals depends whether atom is anionic or cationic. A cation-rich enhances intensity, while an anion-rich leads to deterioration fluorescence signal. However, correspondence coverage intensity not so straightforward and what kind sites are being talked about. In this Article, we report study CdSe−CdS CdSe−ZnS see effect composition luminescence these materials.
A novel photoactive hybrid nanostructure based on zero-dimensional (0-D) light-harvesting components of CuInS2 quantum dots (QDs) and one-dimensional (1-D) transporting channel single-wall carbon nanotube (SWCNT) was synthesized by hydrophobic interaction between alkyl chain dodecanethiol molecule (QDs surface) octadecylamine (CNT surface). Photophysical electrical characterizations suggest that an efficient electron transfer from photoexcited CIS QDs to SWCNT takes place. Furthermore,...
Superior thermally, hydrolytically and mechanically stable heat treated functionalized quantum dot modified PVA membranes with enhanced proton conductivity are reported.
Bioconjugation of quantum dots has resulted in a significant increase resolution biological fluorescent labeling. This intrinsic property can be utilized for sensitive detection target analytes with high sensitivity; including pathogenic bacteria and cancer monitoring. The dot doped silica nanoparticles exhibit prominent emission peaks when excited at 400 nm but on conjugation to model rabbit antigoat antibodies diminished intensity peak 600 nm. It shows that photoluminescence conjugated...
CdSe/CdS/ZnS and CdTe quantum dots (QDs) were synthesized by successive ion layer adsorption reaction (SILAR) technique direct aqueous synthesis respectively using thiol stabilizers. Synthesized QDs stabilized with 3-mercaptopropionic acid (MPA) mercaptosuccinic (MSA) used as fluorescent labels after conjugation folic (FA) anti-HER2 antibodies. Photoluminescence yield of folated CdSe/CdS/ZnS-MPA CdTe-MSA was 59% 77% than that non-folated hydrophilic QDs. The folate receptor-mediated delivery...
Nanotechnology has already begun to influence the lives of people globally through its tremendous potential build energy-efficient systems, clean environment, and promote human well-being. The application nanotechnology agriculture is a relatively new concept, but it for revolutionary transformation. Nanomaterials exhibit unique electrical, optical, chemical, structural characteristics that can underpin multi-interdisciplinary applications. However, several nanomaterial properties require...
CdSe/CdS/ZnS and CdTe quantum dots (QDs) were synthesized by successive ion layer adsorption reaction (SILAR) technique direct aqueous synthesis respectively using thiol stabilizers. Synthesized QDs stabilized with 3-mercaptopropionic acid (MPA) mercaptosuccinic (MSA) used as fluorescent labels after conjugation folic (FA) anti-HER2 antibodies. Photoluminescence yield of folated CdSe/CdS/ZnS-MPA CdTe-MSA was 59% 77% than that non-folated hydrophilic QDs. The folate receptor-mediated delivery...
A sensitive and rapid method for the detection of pathogenic bacteria (Salmonella typhi) in water sample was developed using core-shell CdSe / ZnS quantum dots (QDs) as fluorescence label. Surface-functionalized were synthesized by successive ion layer adsorption reaction (SILAR) technique made hydrophilic ligand exchange method. Developed hydrophobic QDs characterized transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), spectrofluorimetry. Carboxy-...