A5019856480- Electrochemical Analysis and Applications
- Advanced biosensing and bioanalysis techniques
- Analytical Chemistry and Sensors
- Molecular Junctions and Nanostructures
- Plasmonic and Surface Plasmon Research
- Force Microscopy Techniques and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Electrocatalysts for Energy Conversion
- Biosensors and Analytical Detection
- Smart Materials for Construction
- Advanced Battery Materials and Technologies
- Semiconductor materials and devices
- Advanced Chemical Sensor Technologies
- Advanced Memory and Neural Computing
- Gas Sensing Nanomaterials and Sensors
- Advancements in Battery Materials
- Advanced battery technologies research
- Microfluidic and Bio-sensing Technologies
- Advanced Energy Technologies and Civil Engineering Innovations
- Conducting polymers and applications
- Photonic and Optical Devices
- Surface and Thin Film Phenomena
- Concrete Corrosion and Durability
- Semiconductor Lasers and Optical Devices
- Advanced Fluorescence Microscopy Techniques
University of Houston
2017-2024
Changchun Institute of Optics, Fine Mechanics and Physics
2012-2022
Chinese Academy of Sciences
2012-2022
Pacific Northwest National Laboratory
2022
DEVCOM Army Research Laboratory
2022
University of Chinese Academy of Sciences
2022
BioElectronics (United States)
2011-2020
Arizona State University
2011-2020
Tempe Union High School District
2014-2016
Nanjing University
2015
We report on label-free imaging, detection, and mass/size measurement of single viral particles in solution by high-resolution surface plasmon resonance microscopy. Diffraction propagating waves along a metal the creates images individual particles, which allow us to detect binding surfaces functionalized with without antibodies. show that intensity particle image is related mass particle, from we determine distribution influenza detection limit approximately 1 ag (or 0.2 fg/mm 2 ). This...
We demonstrated an electrochemical microscopy technique based on the detection of variations in local current from optical signals arising surface plasmon resonance. It enables measurements (such as voltammetry and amperometry) with high spatial resolution sensitivity, because signal varies density rather than current. The imaging is noninvasive, scanning-free, fast, it constitutes a powerful tool for studying heterogeneous reactions analyzing trace chemicals.
Abstract Metal anode instability, including dendrite growth, metal corrosion, and hetero-ions interference, occurring at the electrolyte/electrode interface of aqueous batteries, are among most critical issues hindering their widespread use in energy storage. Herein, a universal strategy is proposed to overcome instability by rationally designing alloyed materials, using Zn-M alloys as model systems (M = Mn other transition metals). An in-situ optical visualization coupled with finite...
Aqueous zinc-ion batteries, in terms of integration with high safety, environmental benignity, and low cost, have attracted much attention for powering electronic devices storage systems. However, the interface instability issues at Zn anode caused by detrimental side reactions such as dendrite growth, hydrogen evolution, metal corrosion solid (anode)/liquid (electrolyte) impede their practical applications fields requiring long-term performance persistence. Despite rapid progress...
Measuring electrochemical activities of nanomaterials is critical for creating novel catalysts, developing ultrasensitive sensors, and understanding fundamental nanoelectrochemistry. However, traditional methods measure a large number nanoparticles, which wash out the properties individual nanoparticles. We report here study transient oxidation single Ag nanoparticles during collision with an electrode voltammetry immobilized on using plasmonic-based current microscopy. This technique images...
A quantitative formalism of electrochemical surface plasmon resonance (EC-SPR) was developed for studying reactions. The EC-SPR signal from the reactions found to be a convolution function current, and therefore, is powerful tool that can provide information similar conventional current-based techniques. As an example, potential-sweep analyzed in details new way measure voltammetry without need numerical integration. In addition benefits provided by voltammetry, has several unique...
Electrochemistry studies charge transfer and related processes at various microscopic structures (atomic steps, islands, pits kinks on electrodes), mesoscopic materials (nanoparticles, nanowires, viruses, vesicles cells) made by nature humans, involving ions molecules. The traditional approach measures averaged electrochemical quantities of a large ensemble these individual entities, including the microstructures, materials, There is need to develop tools study single entities because real...
Imaging and tracking of nano‐ micrometer‐sized organelles in cells with nanometer precision is crucial for understanding cellular behaviors at the molecular scale. Because fast intracellular dynamic processes, imaging method must also be fast. In addition, to ensure that observed dynamics relevant native functions, it critical keep under their states. Here, a plasmonics‐based technique demonstrated studying 3D high localization (5 nm) temporal (10 ms) resolution. The label‐free can track...
The capability of imaging and detecting single DNA molecules is critical in the study, analysis, applications DNA. Fluorescence a widely used method, but it suffers from blinking photobleaching, fluorescence tags may block or affect binding sites on We report label-free with differential plasmonic technique. technique produces high contrast images due to scattering surface waves by removal background noises interference patterns, allowing for quantitative analysis individual molecules....
We demonstrate here a surface impedance imaging technique based on sensitive dependence of plasmon resonance (SPR) local charge density. By applying potential modulation to sensor surface, we are able simultaneously obtain three images: the dc component and amplitude phase ac component. The image measures molecular binding activity as found in conventional SPR technique, images directly related surface. Our experimental data can be analyzed quantitatively terms simple free electron gas model...
A wavelength-resolved ratiometric photoelectrochemical technique was developed as a novel concept for designing sensors.
Surface plasmon resonance (SPR) has become an indispensable tool for label-free detection and quantification of molecular binding. Traditionally, the principle SPR biosensors is described with a stratified medium model, in which discrete molecules are approximated uniform thin film. With recent technical advances, can now detect extremely low coverage molecules, raises question validity traditional model. Here, we present combined theoretical, numerical experimental analysis by considering...
Plasmonic-based electrochemical impedance spectroscopy (P-EIS) is developed to investigate molecular binding on surfaces. Its basic principle relies the sensitive dependence of surface plasmon resonance (SPR) signal charge density, which modulated by applying an ac potential a SPR chip surface. The component response gives impedance, and dc provides conventional detection. plasmonic-based measured over range frequency in quantitative agreement with impedance. Compared detection, P-EIS taking...
Nanomaterials have been widely used in energy and sensing applications because of their unique chemical physical properties, especially surface reactions. Measuring the local reactions individual nanomaterials, however, has an experimental challenge. Here we report on plasmonic imaging electrochemical gold nanowires (AuNWs). We coated a thin film (plasmonic layer) with dielectric layer (Cytop) refractive index close to that water, then graphene for electrical contact. This design removed...
Surface plasmon resonance microscopy (SPRM) is a powerful platform for biomedical imaging and molecular binding kinetics analysis. However, the spatial resolution of SPRM along propagation direction (longitudinal) determined by decaying length plasmonic wave, which can be as large tens microns. Different methods have been proposed to improve resolution, but each at expense decreased sensitivity or temporal resolution. Here we present method achieve high based on deconvolution complex field....
Measuring local heat generation and dissipation in nanomaterials is critical for understanding the basic properties developing applications of nanomaterials, including photothermal therapy joule heating nanoelectronics. Several technologies have been developed to probe temperature distributions but a sensitive thermal imaging technology with high temporal spatial resolution still lacking. Here, we describe plasmonic microscopy (PTM) image diffusion from nanostructures biologically relevant...
The understanding of lithium (Li) nucleation and growth is important to design better electrodes for high-performance batteries. However, the study Li process still limited because lack imaging tools that can provide information entire dynamic process. We developed used an operando reflection interference microscope (RIM) enables real-time tracking dynamics at a single nanoparticle level. This platform provides us with critical capabilities continuously monitor find formation initial nuclei...
The formation and preservation of the active phase catalysts at triple-phase interface during CO2 capture reduction is essential for improving conversion efficiency electroreduction toward value-added chemicals fuels under operational conditions. Designing such ideal that can mitigate parasitic hydrogen generation prevent degradation reaction (CO2RR), however, remains a significant challenge. Herein, we developed an interfacial engineering strategy to build new SnOx catalyst by invoking...