A5049999504- Transition Metal Oxide Nanomaterials
- Quantum Dots Synthesis And Properties
- Advanced Photocatalysis Techniques
- Crystallization and Solubility Studies
- Gas Sensing Nanomaterials and Sensors
- X-ray Diffraction in Crystallography
- Innovative Microfluidic and Catalytic Techniques Innovation
- Perovskite Materials and Applications
- ZnO doping and properties
- Polyoxometalates: Synthesis and Applications
- Nanocluster Synthesis and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Adsorption and biosorption for pollutant removal
- TiO2 Photocatalysis and Solar Cells
- Crystallography and molecular interactions
- Chalcogenide Semiconductor Thin Films
- Organic Electronics and Photovoltaics
- Organic Light-Emitting Diodes Research
- Electrocatalysts for Energy Conversion
- Advanced biosensing and bioanalysis techniques
- Conducting polymers and applications
- Microfluidic and Capillary Electrophoresis Applications
- Photochromic and Fluorescence Chemistry
- Advanced battery technologies research
- Fuel Cells and Related Materials
City University of Hong Kong
2023-2024
Shanxi University
2024
China University of Petroleum, East China
2024
China University of Geosciences
2010-2024
Xidian University
2023-2024
Shanxi University of Traditional Chinese Medicine
2024
Zhejiang Normal University
2023
University of South Carolina
2014-2020
Massachusetts Institute of Technology
2017-2020
Shanghai Jiao Tong University
2020
Clusters have been identified as important growth intermediates during group III-V quantum dot (QD) formation. Here we report a one-solvent protocol that integrates synthesis, purification, and mass characterization of indium phosphide (InP) QD mixtures. The use matrix-assisted laser desorption/ionization (MALDI) spectrometry (MS) successfully tracks the evolution clusters formation QDs throughout synthesis. Similar are observed large particles, suggesting these serve reservoir for Combining...
Abstract We present a fully continuous chip microreactor‐based multistage platform for the synthesis of quantum dots with heterostructures. The use custom‐designed reactors enables precise control heating profiles and flow distribution across microfluidic channels while conducting multistep reactions. can be easily reconfigured by reconnecting differently designed allowing screening various reaction parameters during nanocrystals. III–V core/shell are chosen as model systems, including...
Developing multifunctional materials with superior thermal conductivity and microwave absorption is an effective means to address the increasingly serious electromagnetic (EM) compatibility heat dissipation problems in modern electron devices. Here, MgO/Mg(OH)2/C, MgO/M/C (M = Co, Ni, Cu), MgO/NOx/C (N Fe, Mn) hybrid foams were synthesized using a facile one-step gas-bubble-assisted combustion method, their texture, composition, properties regulated by tuning salt type feeding ratio. Our...
Abstract Economical NiFe‐based oxygen evolution reaction catalysts have recently gained attention for their potential to accelerate green hydrogen production through water electrolysis. However, practical application is limited by durability issues caused the leaching of Fe sites during operation. Here an operando reconstructed molecule fence, that is, sulfate‐anchored aromatic ring molecule, proposed inhibit atoms and improve catalysts. With this design, sulfate not only immobilizes as...
This article describes the use of gel permeation chromatography (GPC) as a means to separate natively capped colloidal CdSe and CdSe/CdxZn1–xS quantum dots (QDs) from small-molecule impurities in hydrophobic solvents. A range analysis techniques, including 1H NMR, diffusion-ordered NMR (DOSY), thermogravimetric (TGA) have been used compare nature quantities ligands adsorbed on QDs after GPC alternative purification methods. We show that purified samples display lower ligand-to-QD ratio (135...
Almost all applications of colloidal nanocrystals require some type purification or surface modification process following nanocrystal growth. Nanocrystal - the separation from undesired solution components can perturb chemistry and thereby physical properties due to changes in solvent, solute concentrations, exposure oxidation hydrolysis. For example, quantum dots frequently exhibit decreased photoluminescence brightness after precipitation growth solvent subsequent redissolution....
This article describes an experiment designed to identify the role of specific molecular ligands in maintaining high photoluminescence (PL) quantum yield (QY) observed as-synthesized CdSe/CdZnS and CdSe/CdS dots (QDs). Although it has been possible for many years prepare core/shell with near-unity through high-temperature colloidal synthesis, purification such particles is frequently accompanied by a reduction yield. Here, recently established gel permeation chromatography (GPC) technique...
Defect and facet engineering are the two effective approaches to tune surface reactivity of metal-oxide-based sensing materials. Here, oxygen vacancies defective WO3 nanosheets with exposed (002) crystal [D-WO3-(002)] were obtained by a simple hydrothermal–hydrogenation process. The results revealed that D-WO3-(002)-based acetone sensor exhibits excellent comprehensive gas sensitive performance: low limit detection (0.5 ppm), wide range 0.5–100 ppm (S = 2.8∼45.6), high selectivity, fast...
The efficiency of multi-layer OLEDs using indium tin oxide (ITO) and triphenyldiamine is limited by the hole injection rate, or quality contact between two components, respectively. Coating ITO with an ultra-thin Pt layer dramatically improves injection, significantly lowers devices' operating voltage. Figure juxtaposes AFM images unmodified (left) Pt-coated electrode (right).
GPC provides a general approach to purification of variety nanocrystal types, and additionally achieves ligand exchange in continuous flow system.
Abstract 2D Ruddlesden─Popper (RP) halide perovskites are attracting increasing research interest due to their enhanced stability compared 3D perovskites. However, the quantum confinement effect of bulk organic spacers hinders separation and transport photo‐generated carriers. Here, a multiple aromatic ring spacer, 3‐benzothiophene methylammonium (BTMA), is developed for new RP perovskite. The BTMA spacer demonstrated, with significant dipole moment, can impair influence effect, presence S...
The dissolution of active atoms under operating potential will lead to a decline in their oxygen evolution reaction (OER) performance, thus preventing the current highly catalysts from being practically applicable industrial water electrolysis. Here, we propose sequential leaching strategy utilize dynamic restructuring and enhance chemical bond strength for stable OER. Modeling on nickel-iron sulfides (NiFe-S), introduced utilized foreign Mo dopant preleaching as sacrificial agent alleviate...
Advances in sample fabrication have allowed the of pentacene transistors with channel lengths down to 30 nm. The Figure shows a transistor length and width 27 nm 130 nm, respectively. Graceful scaling current–voltage characteristics as function is demonstrated.
This paper presents a fully-continuous novel liquid–liquid-extraction (LLE) platform for the purification of nanoparticles. The use multistage operation enhances purity final stream without expense high solvent consumption. Two case studies, CdSe quantum dots in organic and that gold nanoparticles water, demonstrate LLE is versatile, non-destructive, highly efficient.
A novel monometallic nitride clusterfullerene, UN@C84, has been successfully synthesized and characterized. Single-crystal X-ray diffraction analysis reveals that a rare diatomic UN cluster, one of the smallest known encapsulated clusters,...
Abstract Oscillatory flow reactors provide a surface energy‐driven approach for automatically screening reaction conditions and studying mechanisms of biphasic nanocrystal ligand‐exchange reactions. Sulfide cysteine reactions with as‐synthesized CdSe quantum dots (QDs) are chosen as two model Different variables including the new‐ligand‐to‐QD ratio, size particles, original ligand type examined systematically. Based on in situ‐obtained UV/Vis absorption spectra during reaction, we propose...
The polymeric functionalization of quantum dots via ligand exchange is a robust method for the preparation stable fluorescent particles with high yields. For most biological applications dots, water solubility key requirement; to achieve biocompatibility, systems that can provide as well effective anchoring groups are advantageous. In this work, histamine functional polymers bearing poly(ethylene glycol) (PEG) side chains were prepared using RAFT polymerization. A versatile postmodification...