A5065323457- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Nanowire Synthesis and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Silicon and Solar Cell Technologies
- Silicon Nanostructures and Photoluminescence
- Phase Equilibria and Thermodynamics
- Andrographolide Research and Applications
- Magnetism in coordination complexes
- Copper-based nanomaterials and applications
- Thin-Film Transistor Technologies
- Advanced Photocatalysis Techniques
- Metal complexes synthesis and properties
- Semiconductor materials and devices
- Advanced Surface Polishing Techniques
- Pharmacological Effects of Natural Compounds
- Bone Tissue Engineering Materials
- Quantum Dots Synthesis And Properties
- Drug Solubulity and Delivery Systems
- Radical Photochemical Reactions
- Semiconductor materials and interfaces
- Gas Sensing Nanomaterials and Sensors
- Catalytic C–H Functionalization Methods
- Integrated Circuits and Semiconductor Failure Analysis
- Metal-Organic Frameworks: Synthesis and Applications
University of South Carolina
2020-2025
Southwest Jiaotong University
2021-2023
Aalto University
2018-2023
Tieto (Finland)
2018-2023
Beijing Jiaotong University
2022
University of South Carolina Sumter
2021
Southern Medical University Shenzhen Hospital
2021
University of Akron
2019-2020
Soochow University
2014-2018
Taiyuan University of Technology
2018
Silicon‐based cells could convert more solar energy to electrical if the absorb light. However, nanostructured have demonstrated relatively low power conversion efficiency even when its reflection is very low; thus, they are still far from becoming real products of photovoltaic industry. Here, nanoscale pseudo‐pyramid textured multi‐crystalline silicon (Pmc‐Si) cells, with best ≈18.45%, fabricated by using a metal‐catalyzed chemical etching plus post alkaline on an industrial production...
Although the intriguing plasmonic properties of noble metal nanoparticles originate from collective oscillations free electrons in conduction band, doped semiconductors may also exhibit metal-like, features that are dictated by resonantly excited hole valence band. Here, we combine Au, a representative electron metal, with copper sulfides, class p-type semiconductors, core–shell nanoparticle geometry to construct dual-plasmonic hetero-nanostructures displaying unique multiplex optical...
A new type of palladium-catalyzed 6-endo-selective alkyl-Heck reaction unactivated alkyl iodides has been described. This strategy provides efficient access to a variety 5-phenyl-1,2,3,6-tetrahydropyridine derivatives, which are important structural motifs for bioactive molecules. process displays broad substrate scope with excellent 6-endo selectivity. Mechanistic investigations reveal that this performs via hybrid palladium-radical process.
This Review Article elaborates on the insights gained from <italic>in situ</italic> plasmon-enhanced Raman spectroscopy, which shed light complex mechanisms underpinning plasmon-driven photocatalytic molecular transformations nanostructured metal surfaces.
The superlinear dependence of the reaction rate on power excitation light, which may arise from both thermal and nonthermal effects, has been a hallmark plasmon-driven photocatalysis nanostructured metal surfaces. However, it remains challenging to distinguish quantify effects because even slight uncertainties in measuring local temperatures at active surface sites lead significant errors assessing contributions overall rates. Here we employ surface-enhanced Raman scattering as...
Detection of UV light has traditionally been a major challenge for Si photodiodes due to reflectance losses and junction recombination. Here we overcome these problems by combining nanostructured surface with an optimized implanted compare the obtained performance state-of-the-art commercial counterparts. We achieve significant improvement in responsivity, reaching near ideal values at wavelengths all way from 200 1000 nm. Dark current, detectivity, rise time are turn shown be on similar...
Localized plasmons sustained by metallic nanostructures can be judiciously exploited to trigger photocatalytic reactions through unconventional molecule-transforming channels typically inaccessible heterogeneous catalysis under thermal conditions. With the aid of plasmons, chemisorbed para-mercaptobenzoic acid on nanostructured metal surfaces may selectively transform into thiophenol a protodecarboxylation process in aqueous environments at temperatures substantially lower than those...
Hydroxyapatite (HAP) is an extensively used orthopedic biomaterial because of its high biocompatibility and osteoconductivity. Implant-related infection a major cause device failure. Previous research showed that silver-doped hydroxyapatite nanoparticles (Ag-HAP NPs) have prominent antimicrobial activity, but their plasma protein response remained unexplored. Here we investigated the effects synthesis conditions on Ag-HAP NP (E. coli S. epidermidis) biocompatibility, adsorption two blood...
Metal-assisted chemical etching (MACE) enables efficient texturing of diamond-wire sawn multicrystalline silicon wafers. However, the excellent optics are often sacrificed by polishing surface to achieve better passivation with chemicalvapor-deposited (CVD) nitride (SiN <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">X</sub> ). In this paper, we show that a step is not required when CVD SiN replaced atomic-layer-deposited (ALD) aluminum oxide...
Metal-assisted chemical etching (MACE) is a widely applied process for fabricating Si nanostructures. As an electroless process, it does not require counter electrode, and usually considered that only holes in the valence band contribute to process. In this work, charge carrier collecting p-n junction structure coated with silver nanoparticles used demonstrate also electrons conduction play fundamental role MACE, enable energy conversion was previously reported. The studied structures...
Near-infrared (NIR) sensors find numerous applications within various industry fields, including optical communications and medical diagnostics. However, the state-of-the-art NIR made of germanium (Ge) suffer from rather poor response, largely due to high reflection illuminated device surface. We demonstrate here a method increase sensitivity Ge by implementing nanostructures wafer surfaces. The absorbance nanostructured wafers is measured be >99 % in whole UV-VIS-NIR spectrum up 1600 nm...
Energetic hot electrons generated upon nonradiative decay of localized plasmons in metallic nanostructures can be effectively harnessed to catalyze photochemical transformations molecular adsorbates through unique reaction pathways. When designing metal–adsorbate hybrid systems for electron-driven photocatalysis, both the intrinsic plasmonic properties photocatalysts and chemical nature interactions should taken into careful considerations. In this work, we show that reactivity nitrophenyl...
Raman spectroscopy was used to establish direct evidence of heterometallic metal centers in a metal-organic framework (MOF). The Cu3(BTC)2 MOF HKUST-1 (BTC3- = benzenetricarboxylate) transmetalated by heating it solution RhCl3 substitute Rh2+ ions for Cu2+ the dinuclear paddlewheel nodes framework. In addition Cu-Cu and Rh-Rh stretching modes, spectra (CuxRh1-x)3(BTC)2 show Cu-Rh mode, indicating that mixed-metal are formed after transmetalation. Density functional theory studies confirmed...
Optically excited plasmonic nanostructures may function as molecular scissors with unique capabilities to cleave specific chemical bonds in adsorbates through either plasmon-enhanced intramolecular electronic excitations or injection of photoexcited hot electrons into adsorbate orbitals. Here we chose plasmon-driven decarboxylation aromatic carboxylates a model reaction system demonstrate that holes, instead electrons, could also be effectively harnessed trigger regioselective bond cleavage...
Mass production of diamond-wire-sawn (DWS) multicrystalline silicon (mc-Si) solar cells reached a significant point maturity through utilization metal-catalyzed chemical etching (MCCE). However, nanotextured DWS mc-Si usually produced with Ag-MCCE still suffer from certain drawbacks, such as remaining saw marks, color differences among grains, and slight decreases in the open-circuit voltage (Voc). In this work, we show that unoriented Cu-based MCCE (Cu-MCCE) not only depresses marks but...
Growing SiO2 layer by wet-chemical oxidation of Si surfaces before growth another insulating film(s) is a used method to passivate interfaces in applications (e.g., solar cell, photodiode) at low temperatures (LT) below 450 °C. We report on potential LT ultrahigh-vacuum (UHV) treatments combined with the oxidation, investigating effects LT-UHV after and growing Al2O3 film top SiO2/Si. This modifies SiO2/Si found (i) decrease defect-level density, (ii) increase negative fixed charge (iii)...
Copper sulfide nanoparticles represent a class of dual-functional materials whose optical properties are dominated by interband electronic transitions and intraband plasmon resonances, both which can be systematically tuned tailoring the geometric parameters chemical compositions nanoparticles. Here, we report temperature-programmed synthetic approach to monolithic covellite (CuS) nanodisks with thicknesses around 11 nm lateral diameters widely tunable in range ∼100–300 nm. Our expands...
We study the surface morphology, optical absorption (400-1100 nm), and carrier lifetime of black silicon fabricated by femtosecond (fs) laser in air. explore a large parameter space, for which we adopt single ξ to describe cumulative fluence delivered sample. also laser-oxidized layer measuring its photoluminescence spectra comparing effect on aforementioned properties. Our broad range is instructive choosing parameters when targeting different applications.