A5063852278- Copper-based nanomaterials and applications
- Advanced Photocatalysis Techniques
- Gold and Silver Nanoparticles Synthesis and Applications
- Quantum Dots Synthesis And Properties
- Catalytic Processes in Materials Science
- TiO2 Photocatalysis and Solar Cells
- Ion-surface interactions and analysis
- Plasmonic and Surface Plasmon Research
- Molecular Junctions and Nanostructures
- nanoparticles nucleation surface interactions
- Iron oxide chemistry and applications
- Advanced Electron Microscopy Techniques and Applications
- Electronic and Structural Properties of Oxides
- ZnO doping and properties
- Electrocatalysts for Energy Conversion
- Biosensors and Analytical Detection
- Nanomaterials for catalytic reactions
- Metal-Organic Frameworks: Synthesis and Applications
- Advanced biosensing and bioanalysis techniques
- Advanced Nanomaterials in Catalysis
- Magnetic properties of thin films
- Advanced oxidation water treatment
- Nuclear materials and radiation effects
- Solar-Powered Water Purification Methods
- Nanopore and Nanochannel Transport Studies
University of Florida
2012-2023
Gainesville Obstetrics & Gynecology
2014-2020
Northwestern University
2010
Ideal solar-to-fuel photocatalysts must effectively harvest sunlight to generate significant quantities of long-lived charge carriers necessary for chemical reactions. Here we demonstrate the merits augmenting traditional photoelectrochemical cells with plasmonic nanoparticles satisfy these daunting photocatalytic requirements. Electrochemical techniques were employed elucidate mechanics plasmon-mediated electron transfer within Au/TiO2 heterostructures under visible-light (λ>515 nm)...
Water reduction under two different visible-light ranges (λ > 400 nm and λ 435 nm) was investigated in gold-loaded titanium dioxide (Au-TiO2) heterostructures with sizes of Au nanoparticles (NPs). Our study clearly demonstrates the essential role played by NP size plasmon-driven H2O reveals distinct mechanisms to clarify photocatalytic activity excitation conditions. The governs efficiency plasmon-mediated electron transfer plays a critical determining potentials electrons transferred TiO2...
Surface plasmon resonance (SPR)-induced photothermal heating has garnered a substantial amount of research interest across various disciplines. The first applications SPR-induced light-to-heat energy conversion were in biological systems to photothermally ablate cancer cells vivo. More recently, this spatially localized and highly tunable technique been extensively used for variety chemical reactions other associated applications. This feature article highlights the recent developments...
The metal/oxide interface has been extensively studied due to its importance for heterogeneous catalysis. However, the exact role of interfacial atomic structures in governing catalytic processes still remains elusive. Herein, we demonstrate how manipulation at Au/TiO2 significantly alters electron distribution and prompts O2 activation. It is discovered that defect-free electrons transfer from Ti3+ species into Au nanoparticles (NPs) further migrate adsorbed perimeter molecules (i.e., form...
Catechol stabilizes photo-generated holes on metal nanoparticles to create a new multi-hole reaction pathway for oxidizing water under visible light.
Plasmon-mediated carrier transfer (PMCT) at metal-semiconductor heterojunctions has been extensively exploited to drive photochemical reactions, offering intriguing opportunities for solar photocatalysis. However, date, most studies have conducted using noble metals. Inexpensive materials capable of generating and transferring hot carriers photocatalysis via PMCT rarely explored. Here, we demonstrate that the plasmon excitation nickel induces both electrons holes from Ni TiO2 in a rationally...
Cu-TCPP nanosheets exhibit a high density of active sites and low diffusion barriers for styrene epoxidation.
Light-driven synthesis of plasmonic metal nanostructures has garnered broad scientific interests. Although it been widely accepted that surface plasmon resonance (SPR)-generated energetic electrons play an essential role in this photochemical process, the exact function plasmon-generated hot holes regulating morphology not fully explored. Herein, we discover those work with adsorbates collectively to control anisotropic growth gold (Au) nanostructures. Specifically, is found stabilized by...
Sub-15 nm Au nanoparticles have been fabricated on a nanostructured Ag surface at room temperature via liquid-phase chemical deposition upon excitation of the localized plasmon resonance (SPR). Measurement SPR-mediated photothermal local heating substrate by molecular thermometry strategy indicated to be above 230 °C, which led an efficient decomposition CH(3)AuPPh(3) form surface. Particle sizes were tunable between 3 and 10 adjusting time. A surface-limited growth model for is consistent...
Anisotropic Fe3O4 octahedrons are obtained via a simple solvothermal synthesis with appropriate sizes for various technological applications. A complete suite of materials characterization methods confirms the magnetite phase these structures, which exhibit substantial saturation magnetization and intriguing morphologies wide range
Abstract Ideal solar‐to‐fuel photocatalysts must effectively harvest sunlight to generate significant quantities of long‐lived charge carriers necessary for chemical reactions. Here we demonstrate the merits augmenting traditional photoelectrochemical cells with plasmonic nanoparticles satisfy these daunting photocatalytic requirements. Electrochemical techniques were employed elucidate mechanics plasmon‐mediated electron transfer within Au/TiO 2 heterostructures under visible‐light ( λ...
Responsive systems sensitive to near-infrared (NIR) light are promising for triggered release due efficient deep tissue penetration of NIR irradiation relative higher energy sources (e.g., UV), allowing spatiotemporal control over triggering events with minimal potential damage. Herein, we report star polymers containing thermally-labile azo linkages that dissociate during conventional heating or localized via the photothermal effect upon irradiation. Controlled was investigated loaded a...
Open AccessCCS ChemistryRESEARCH ARTICLE1 May 2021Regulating Electronic Status of Platinum Nanoparticles by Metal–Organic Frameworks for Selective Catalysis Yu Shen†, Ting Pan†, Peng Wu, Jiawei Huang, Hongfeng Li, Islam E. Khalil, Sheng Bing Zheng, Jiansheng Qiang Wang, Weina Zhang, Wei David and Fengwei Huo Shen† Key Laboratory Flexible Electronics (KLOFE), Institute Advanced Materials (IAM), Nanjing Tech University, 211816 , Pan† Wu Huang Department Chemistry, Center Catalysis, University...
Plasmon-generated hot electrons in metal/oxide heterostructures have been used extensively for driving photochemistry. However, little is known about the origin of plasmon-generated holes promoting photochemical reactions. Herein, we discover that, during nonradiative plasmon decay, interband excitation rather than intraband generates energetic that enable to drive water oxidation at Au/TiO2 interface. Distinct from lukewarm via only remain on Au, are found be transferred Au into TiO2 and...
Despite many promising reports of plasmon‐enhanced photocatalysis, the inability to identify individual contributions from multiple enhancement mechanisms has delayed development general design rules for engineering efficient plasmonic photocatalysts. Herein, a photocathode comprised Au@SiO 2 (core@shell) nanoparticles embedded within Cu O nanowire network is constructed exclusively examine contribution one such mechanism: electromagnetic near‐field enhancement. The influence local field...
The widespread implementation of surface enhanced Raman scattering (SERS) techniques for chemical and biological detection requires an inexpensive, yet robust SERS substrate with high sensitivity reproducibility. To that end, we present a facile method to fabricate plasmonic substrates well-distributed "hot spots" on large scale reproducible enhancement factors ∼10(8) the probe molecule 4-aminobenzenethiol (4-ABT). is attributed synergistic interactions between strong coupling among...
The photothermal heating of plasmonic metal nanostructures can be exploited for bottom-up nanofabrication via surface plasmon-mediated chemical solution deposition (SPMCSD). Herein, we demonstrate the versatility this strategy with a rapid (t ≈ 5 min) metallic copper nanoparticles (Cu NPs) on silver (Ag) film nanosphere (AgFON) substrate under low-power, visible-light irradiation (I0 = 2.0 W/cm2, λ > 435 nm). resultant exhibit significant optical extinction and enriched affinity Raman probe...