Fluorescent carbon nanoparticles were synthesized from a single precursor and applied for explosives detection.

ConspectusThe rediscovery of the halide perovskite class compounds and, in particular, organic and inorganic lead (LHP) materials lead-free derivatives has reached remarkable landmarks numerous applications. First among these is field photovoltaics, which at core today's environmental sustainability efforts. Indeed, efforts have born fruit, reaching to date a power conversion efficiency 25.2% for double-cation Cs, FA thin film device. Other applications include light particle detectors as...

Liquid-liquid phase separation (LLPS) of biopolymers has recently been shown to play a central role in the formation membraneless organelles with multitude biological functions

Fluorescent pyrene-polyethersulfone (Py-PES) nanofibers were prepared through electrospinning technique using mixed solvents. The effects of solvent ratio and polymer/fluorophore concentrations on electrospun nanofiber's morphology its sensing performance systematically investigated optimized. Py-PES under optimized conditions further applied for highly sensitive detection explosives, such as picric acid (PA), 2,4,6-trinitrotoluene (TNT), 2,4-dinitrotoluene (DNT),...

Quantum dots are nanoscale quantum emitters with high yield and size-dependent emission wavelength, holding promises in many optical electronic applications. When situated close to noble metal nanoparticles, their emitting behavior can be conveniently tuned because of the interaction between excitons plasmons nanoparticles. This at single dot level gives rise reduced or suppressed photoluminescence blinking enhanced multiexciton emission, which is difficult achieve isolated dots. However,...

In this work, we systematically investigated the plasmonic effect on blinking, photon antibunching behavior and biexciton emission of single CdSe/CdS core/shell quantum dots (QDs) near gold nanoparticles (NPs) with a silica shell (Au@SiO2). order to obtain strong interaction between plasmons excitons, Au@SiO2 NPs QDs appropriate sizes were chosen so that plasmon resonance overlaps absorption QDs. We observed in regime low excitation power, blinking properties modified significantly when...

Photoinduced intermolecular electron transfer (ET) dynamics between various 7-aminocoumarin acceptors and N,N-dimethylaniline (DMAN) donor has been studied in copolymer-surfactant supramolecular assemblies prepared aqueous 1% P123 triblock copolymer micellar solution with varying concentration of surfactants (sodium dodecyl sulfate (SDS), cetyl trimethyl ammonium chloride (CTAC), triton-X-100 (TX100)). The aim the present study is to modulate reaction environment, especially degree hydration...

Abstract Biofunctionalized nanoparticles are increasingly used in biomedical applications including sensing, targeted delivery, and hyperthermia. However, laser excitation associated heating of the nanomaterials may alter structure interactions conjugated biomolecules. Currently no method exists that directly monitors local temperature near material's interface where biomolecules are. Here, a nanothermometer is reported based on DNA‐mediated points accumulation for imaging nanoscale...

A tunable strategy to control surface accessibility in densely coated DNA-modified gold nanoparticles. Depending on receptor densities, using spacers with DNAs markedly influences association ( k ) kinetics DNA-mixed monolayers.

Formation of a p-n junction-like with large built-in field is demonstrated at the nanoscale, using two types semiconducting nanoparticles, CsPbBr3 nanocrystals and CdSe nanoplatelets, capped molecular linkers. By exploiting chemical recognition capping molecules, nanoparticles are brought into mutual contact, thus initiating spontaneous charge transfer formation strong junction field. Depending on choice magnitude latter shown to vary in broad range, corresponding an interface potential step...

Well-defined Zn2GeO4/g-C3N4 nanocomposites with a band alignment of type-I were prepared by the ultrasound-assisted solvent method, starting from g-C3N4 nanosheets and incorporating 0, 10, 20, 40 wt% Zn2GeO4. In this study, we have investigated in-depth photoluminescence emission photocatalytic activity these nanocomposites. Our experimental results showed that an increased mass ratio Zn2GeO4 to can significantly improve their responses. Additionally, noted broadband (PL) for reveals three...

Hybrid nanostructures comprised of metal nanoparticles (MNPs) and quantum dots (QDs) have been found to exhibit unique, new optical properties due the interaction that occurs between MNPs QDs. The aim this work is understand how exciton–plasmon in these systems dependent on excitation wavelength. nanoassemblies consisted gold (Au) NPs coated a silica (SiO2) shell controlled thickness core/shell CdSe/CdS QDs adsorbed onto SiO2 shells. Our findings show photoluminescence lifetimes hybrid...

Alloyed CdSxSe1–x semiconductor nanocrystals (NCs) were obtained from a one-pot synthesis at reduced temperature with moderate quantum yield. Comprehensive structural characterizations of the CdSSe NCs reveal that have gradient alloyed structure, Cd evenly distributed over entire NC, Se rich in center, and S outer region. This is due to difference nucleation kinetics precursors. Optical studies single NC level show photoluminescence blinking, increased "on" time fraction, good...

In this study, we investigate the change in photon emission statistics of single CdSe/CdS core/shell quantum dots (QDs) on dielectric modified gold nanoparticle (NP) substrates as a function excitation wavelength.

Multivalency as an interaction principle is widely utilized in nature. It enables specific and strong binding by multiple weak interactions through enhanced avidity a core process immune recognition cellular signaling, which also current concept drug design. Here, we use the high signals from plasmon-enhanced fluorescence of nanoparticles to extract kinetics dynamics multivalent on single-molecule level real time. We study mono-, bi-, trivalent using DNA Holliday Junction model construct...

The hydro(solvo)thermal approaches due to their simplicity and relatively low cost have attracted great attention novel advanced materials processing with controlled particle sizes well-defined morphologies, including the desirable obtaining of diverse metastable phases. Furthermore, in this case, such obtained by strategy generally a high crystallinity structure as main characteristic, which is interesting for wide range technological applications performance. This critical review presents...

Abstract Multivalency as an interaction principle is widely utilized in nature. It enables specific and strong binding by multiple weak interactions through enhanced avidity a core process immune recognition cellular signaling current concept drug design. Rapid unbinding of monovalent constituent during multivalent creates dynamics that require single-molecule approach to be studied. Here, we use the high signals from plasmon fluorescence nanoparticles extract kinetics on level real-time. We...

In this work, we investigated how the blinking statistics and photon antibunching behavior of single CdSe/CdS core/shell quantum dots(QDs) get modified in presence gold nanoparticles(Au NPs) overcoated with a silica shell varying thickness.(Au@SiO2). The Au@SiO2 NPs have distinct plasmon resonance peaks which overlap absorption emission QDs, thereby effectively increasing mutual plasmon-exciton interactions between them. From second-order photoluminescence intensity cross-correlation...

Malaria plagues seriously in some tropical areas of the world, partly due to lack low-cost, sensitive diagnostic tools accessible. A simple way for fast monitoring malaria infection is detect elevated level heme blood serum. Albumins are widely used bioengineering their good biocompatibility, and biodegradability. Herein we report that glutaraldehyde cross-linked bovine serum albumin (BSA) forms a suspension novel fluorescent nanoparticles with an average size ~40 nm, exhibiting strong green...