A5069310610- Lanthanide and Transition Metal Complexes
- Luminescence Properties of Advanced Materials
- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Nanocluster Synthesis and Applications
- Optical properties and cooling technologies in crystalline materials
- Catalytic Processes in Materials Science
- Atomic and Subatomic Physics Research
- Electrochemical Analysis and Applications
- Luminescence and Fluorescent Materials
- Bioactive Compounds and Antitumor Agents
- Advanced Condensed Matter Physics
- Nanoplatforms for cancer theranostics
- Covalent Organic Framework Applications
- Organic Light-Emitting Diodes Research
- Advanced Photocatalysis Techniques
- Water Quality Monitoring and Analysis
- Gas Sensing Nanomaterials and Sensors
- Analytical Chemistry and Sensors
- Solid-state spectroscopy and crystallography
- Nanoparticle-Based Drug Delivery
- Nigella sativa pharmacological applications
Material Sciences (United States)
2025
Jain University
2022-2025
University of Pittsburgh
2020-2022
University of Calcutta
2015-2020
This work develops a rationale for effective sensitization of trivalent lanthanide cation (Ln3+) luminescence in semiconductor nanoparticle by examining the characteristics Ln3+ dopants titanium dioxide nanoparticles [Ti(Ln)O2] [Ln = praseodymium (Pr), neodymium (Nd), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), or ytterbium (Yb)], as representative model system. For excitation TiO2 host at 350 nm intraconfigurational...
Doped inorganic nanoparticles (NPs) have enabled researchers across multiple disciplines to create new materials with unique optical, electronic, magnetic, electrical, chemical, and/or compositional properties. In the quest for generating newer functional controlled optical and electronic properties, use of d- f-block elements as dopants in NPs remain at forefront research. This article summarizes experiments that identify important control parameters, form NP core surface promoting...
Trivalent lanthanide (Ln3+) doped semiconductor nanoparticles (NPs) provide an avenue for developing unique luminophores, which combine the properties of Ln3+ and NPs. Realizing their promise requires a thorough understanding underlying photophysical processes. This article summarizes experimental findings uses them to sketch framework important NP core surface that affect luminescence. A charge trapping mediated emission sensitization mechanism is shown operate in both synthetically...
Post-synthetic ligand modification to generate chiral CsPbBr 3 NPs.
ConspectusThe unique photon emission signatures of trivalent lanthanide cations (Ln3+, where Ln = Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb) enables multicolor from semiconductor nanoparticles (NPs) either through doping multiple Ln3+ ions distinct identities or in combination with other elements for the creation next-generation light emitting diodes (LEDs), lasers, sensors, imaging probes, optoelectronic devices. Although advancements have been made synthetic strategies to dope...
The lanthanide photoluminescence in the trivalent terbium (Tb3+) incorporated zinc sulfide nanoparticles [Zn(Tb)S] has been reported with nanoparticle size varying from 2.0 ± 0.3 to 14 3 nm diameter as a function of reaction temperature. In all nanoparticles, Tb3+ luminescence sensitized by acting an optical antenna. relative contribution different excitation bands sensitizing Zn(Tb)S found be dependent on nanoparticles. observed efficiency rationalized competing factors: (i) sensitization...
This work reports the host (semiconductor nanoparticles) sensitized dopant (lanthanides, Ln) photoluminescence in near band gap matched Sn(Ln)O2 and Zn(Ln)S [Ln = Sm, Tb] nanoparticles to address importance of nanoparticle identity absolute underlying process. While sensitization was evident Sn(Sm)O2 Zn(Tb)S nanoparticles, same not observed Sn(Tb)O2 Zn(Sm)S nanoparticles. observation stresses as determining factor realizing host-sensitized provides important insight into developing novel...
Lanthanide cations tune the infrared absorption characteristics of capping ligands in Zn(Ln)S [Ln = Sm, Eu, Tb, Dy] nanoparticles.
This study develops water dispersible trivalent terbium cation incorporated zinc sulfide nanoparticles for potential anti-cancer therapy and cellular imaging.
A room temperature halide exchange mediated cation strategy leads to Ln 3+ doping in perovskite NPs.
The chiro-optical properties of CsPbBr 3 nanoparticles (NP) capped by chiral organic ligands are strongly dependent on their size, with the CD response first exciton band decreasing 100-fold upon tripling NP edge length.
This study presents a halide exchange mediated cation reaction to co-dope d- and f-block elements in CsPbX3 NPs at room temperature. Addition of MnCl2 YbCl3 CsPbBr3 induces ion reactions generating the corresponding CsPbBr3/MnCl2YbCl3 NPs. In addition perovskite emission, display sensitized Mn2+ Yb3+ emissions concert spanning UV, visible, NIR spectral region. Structural spectroscopic characterizations indicate substitutional displacement Pb2+ by Yb3+. The identity host modulating was also...
Pb2+ codoping enhances the Tb3+ emission in trivalent terbium-doped zinc sulfide [Zn(Tb)S] nanoparticles (NPs). The Tb3+-Pb2+ spatial proximity and a favorable codopant electronic energy level alignment contribute toward this brightening. This work tests performance of Zn(TbPb)S Zn(Tb)S/Pb NPs, where dopants within parentheses after slashes indicate their synthetic postsynthetic doping, respectively. When screened against steady-state time-resolved photoluminescence, photoelectron...
A systematic comparison of the Ln3+ [Ln = Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb] photoluminescence in doped tin dioxide [Sn(Ln)O2] and titanium [Ti(Ln)O2] nanoparticles shows that emission efficiency trivalent lanthanide cations (Ln3+) an oxide matrix can be improved by change cation site symmetry. An analysis quantum yield asymmetry ratio is used to identify importance symmetry breaking around dopant for enhancing intensity. These findings important criterion engineering luminescence...
Multiple and distinct lanthanide (Ln)-doped nanoparticles (NPs) can benefit in accessing multiplex assays for photoluminescence-based applications. This study develops Tb–Eu co-doped ZnS using different synthetic pathways. These include Zn(Tb)S/Eu, Zn(Eu)S/Tb, Zn(TbEu)S, ZnS/TbEu NPs, where the lanthanides within parenthesis after a slash indicate their addition synthetically postsynthetically, respectively. The differing protocols affect dopant concentrations spatial location which give...
This work assesses inter lanthanide photophysical interactions in titanium dioxide nanoparticles towards the development of multiplex assays.
This work reports the photophysical properties of 1-thioglycerol capped hydrophilic terbium cation incorporated (doped) zinc sulfide [Zn(Tb)S] nanoparticles, which have been post-synthetically modified using Pb2+ [Zn(Tb)S/Pb] under ambient conditions with : [Pb2+] = 1 10-5-1 10, essentially providing a scenario low to heavy co-doping and ultimately possibility forming material different chemical identity. The effects selected concentrations [M n+] 10-2 also evaluated for post-synthetic...
A room temperature based spectroscopic analysis technique assesses the luminescence properties from different spatial location of lanthanide cations in zinc sulfide nanoparticles.
This work introduces APTMS capped Ti(Sm)O<sub>2</sub> nanoparticles as reporters for live-cell imaging with negligible cytotoxicity and resistance to photobleaching.