A5080264485- Advanced Photocatalysis Techniques
- Carbon Nanotubes in Composites
- Mesoporous Materials and Catalysis
- Graphene research and applications
- Zeolite Catalysis and Synthesis
- Perovskite Materials and Applications
- Ferroelectric and Piezoelectric Materials
- Copper-based nanomaterials and applications
- Electrocatalysts for Energy Conversion
- Mechanical and Optical Resonators
- Catalytic Processes in Materials Science
- Advanced battery technologies research
- Covalent Organic Framework Applications
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Gas Sensing Nanomaterials and Sensors
- Wireless Body Area Networks
- Molecular Junctions and Nanostructures
- Multiferroics and related materials
- Quantum Dots Synthesis And Properties
- Reproductive Health and Technologies
- Breastfeeding Practices and Influences
- Metal-Organic Frameworks: Synthesis and Applications
- Infant Development and Preterm Care
- Force Microscopy Techniques and Applications
Southern University of Science and Technology
2016-2025
Henan Provincial People's Hospital
2025
Zhengzhou University
2025
Shanghai Jiao Tong University
2017-2023
Ruijin Hospital
2020-2023
Helmholtz-Zentrum Dresden-Rossendorf
2023
Guizhou Provincial People's Hospital
2014-2022
Hunan Provincial Maternal and Child Health Hospital
2019-2021
National Taiwan Ocean University
2021
ORCID
2020
Molecular electronics is often limited by the poorly defined nature of contact between molecules and metal surface. We describe a method to wire into gaps in single-walled carbon nanotubes (SWNTs). Precise oxidative cutting SWNT produces carboxylic acid-terminated electrodes separated </=10 nanometers. These point contacts react with derivatized amines form molecular bridges held place amide linkages. chemical are robust allow wide variety be tested electrically. In addition testing wires,...
MCM-41/ZSM-5 composites were prepared using a dual templating method through process of two-step crystallization. Mesoporous MCM-41 was first synthesized the self-assembling surfactant cetyltrimethylammonium bromide and subsequently amorphous wall recrystallized with structure-directing agent tetrapropylammonium bromide, which introduced into pretreatment process. A solid to solid-phase transformation mechanism presented for recrystallization framework. Two kinds stable can be during course...
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTFabrication of Ordered Porous Structures by Self-Assembly Zeolite NanocrystalsLimin Huang, Zhengbao Wang, Jinyu Sun, Lei Miao, Quanzhi Li, Yushan Yan, and Dongyuan ZhaoView Author Information Department Chemistry, Fudan University Shanghai 200433, P. R. China Chemical Environmental Engineering California, Riverside, California 92521 Cite this: J. Am. Chem. Soc. 2000, 122, 14, 3530–3531Publication Date (Web):March 22, 2000Publication History...
Dielectric materials with a very low dielectric constant, k, will be required to overcome problems such as cross-talk and propagation delay in future generations of microprocessors, whose features are becoming increasingly smaller. Here pure-silica zeolite is examined an alternative low-k material. Thin films prepared by in-situ crystallization (see Figure) spin-on process compared.
Rayleigh scattering spectra were obtained from individual single-walled carbon nanotubes with the use of a laser-generated visible and near-infrared supercontinuum. This diagnostic method is noninvasive general for nanoscale objects. The approach permits clear identification excited states in arbitrary metallic semiconducting nanotubes. We analyzed spectral lineshapes relation to role excitonic effects correlated results Raman data on tubes. nanotube structure remained same over distances...
We simultaneously determined the physical structure and optical transition energies of individual single-walled carbon nanotubes by combining electron diffraction with Rayleigh scattering spectroscopy. These results test fundamental features excited electronic states nanotubes. directly verified systematic changes in semiconducting as a function their chirality observed predicted energy splittings transitions metallic
Conductive polyaniline nanowires in emeraldine form can be deposited by potentiodynamic electropolymerization from a reverse hexagonal liquid crystalline phase where one-dimensional (1D) aqueous channels serve as space-confined reactors. Polyaniline nanowire bundles with single-wire diameter of 50–70 nm and length several microns were obtained surfactant sodium bis(2-ethylhexyl) sulfosuccinate (AOT) phase. Impedance measurement suggests improved ordering the crystal under external electric...
The preparation of ultra low-k zeolite films with high mechanical strength by a simple spin-on process is demonstrated. Continuous, smooth, thin silicalite dielectric constant 2.1 and elastic modulus 16–18 GPa are obtained this process, which compatible the requirements semiconductor manufacturers. Polishing experiments showed that film potentially chemical polishing (CMP). described pure silica could be an attractive candidate for ultra-low-k materials future generation microprocessors.
Abstract Studying inter‐dimensional phase transitions of zeolitic‐imidazolate frameworks (ZIFs) is essential for developing strategies in controlling morphology and properties. Herein, the topotactic transformations 3D ZIF‐67 to 2D ZIF‐L are investigated detail by employing a simple efficient solvent‐induced growth method. In addition ZIF‐L, series novel core–shell composites ZIF‐67@ZIF‐L, with unprecedented morphologies, also obtained well‐defined. The different behaviors amine hydrogen...
Hierarchical pipe-in-pipe carbon nitride with oxygen doping and defects synergistically promotes solar-to-hydrogen conversion.
Organic-inorganic lead halide perovskite solar cells (PSCs) have achieved impressive progress in both conversion efficiency and stability. However, the leakage risk of toxic fabrication service PSCs hinders their commercialization; hence, management is imperative. Here, we report a close-loop recycling strategy to collect key materials involved devices with butylamine (BA), even regenerating recycled including absorbers NiOx-coated ITO glass substrates. The regenerated show performance...
π-Electrons have been successfully connected to an oxygen-doped porous carbon nitride by one-pot pyrolysis of the mixture urea, ethanol, and 4-iodobenzaldehyde (IBD) in atmosphere. The resulting COCN20 exhibits superior photocatalytic hydrogen production up 6.88 mmol h–1 gcat–1 with a relatively high apparent quantum efficiency (20.6% at 325 nm) as well toluene oxidation outstanding conversion rate 3.75 under 460 nm irradiation. Other π-electrons from aromatic heterocycles could also be...
This study explores how to populate the surface of carbon nanotubes with functional molecules that can be toggled back-and-forth between different molecular conformations. The synthesized for this are tagged a photoswitchable headgroup and group which directs assembly on nanotubes. Single-walled nanotube field effect transistors switch high low conductance as switched light open closed These devices detect photoswitching approximately 104 molecules.
We report the controlled chemical vapor deposition (CVD) growth of single-walled carbon nanotubes (SWNTs), using ethanol as feedstock and bimetallic CoMo-doped mesoporous silica (SBA16) catalyst. Ultralong (up to 4 mm) horizontally aligned SWNTs can be grown directly on flat substrates or across slits (20−120 μm apart), orientation is always parallel gas flow direction. The control direction length also enables us fabricate nanotube arrays two-dimensional networks surfaces. relatively fastit...
Sol–gel derived sulfonated phenethylsilica with hydrophilic –Si-OH and proton conductive –SO3H functional groups was used as a bifunctional additive to improve the conductivity water uptake characteristics of Nafion. Nafion-bifunctional silica (NBS) composite membranes were prepared by casting Nafion–ethanol solutions mixed sol. The ion exchange capability NBS increases linearly amount incorporated, is about 1.9 × 10−3 mol SO3H g−1 for 7.5 wt% silica. Liquid measurements showed that have...
Advanced applications for high k dielectric and ferroelectric materials in the electronics industry continues to demand an understanding of underlying physics decreasing dimensions into nanoscale. We report synthesis, processing, electrical characterization thin (&lt;100nm thick) nanostructured films barium titanate (BaTiO3) built from uniform nanoparticles (&lt;20nm diameter). introduce a form processing as step toward ability prepare textured based on assembly nanoparticles....
The electronic properties of single-walled carbon nanotubes (SWNTs) are altered by intertube coupling whenever bundles formed. These effects examined experimentally applying Rayleigh scattering spectroscopy to probe the optical transitions given individual SWNTs in their isolated and bundled forms. transition energies observed undergo redshifts tens meVs upon bundling with other SWNTs. can be understood as arising from mutual dielectric screening a bundle.
Abstract Nanodielectrics is an emerging field with applications in capacitors, gate dielectrics, energy storage, alternatives to Li‐ion batteries, and frequency modulation communications devices. Self‐assembly of high k dielectric nanoparticles a highly attractive means produce nanostructured films improved performance—namely tunability, low leakage, loss—as function size, composition, structure. One the major challenges conversion nanoparticle building block into reliable thin film device...