A5016221145- Photonic and Optical Devices
- Plasmonic and Surface Plasmon Research
- Nanowire Synthesis and Applications
- Luminescence Properties of Advanced Materials
- Near-Field Optical Microscopy
- Inorganic Fluorides and Related Compounds
- Quantum Dots Synthesis And Properties
- Advanced biosensing and bioanalysis techniques
- Photonic Crystals and Applications
- Semiconductor materials and devices
- Graphene research and applications
- 2D Materials and Applications
- Electronic and Structural Properties of Oxides
- Gold and Silver Nanoparticles Synthesis and Applications
- Mechanical and Optical Resonators
- Diamond and Carbon-based Materials Research
- Advanced Sensor and Energy Harvesting Materials
- Carbon Nanotubes in Composites
- Nanomaterials and Printing Technologies
- Advanced Thermoelectric Materials and Devices
- ZnO doping and properties
- Carbon and Quantum Dots Applications
- Advanced Biosensing Techniques and Applications
- Membrane-based Ion Separation Techniques
- Advanced Battery Materials and Technologies
University of California, Riverside
2014-2024
Tianjin University
2023
Riverside
2017-2019
Materials Science & Engineering
2019
University of California System
2013-2017
Tianjin Synthetic Material Research Institute (China)
2015
Lawrence Berkeley National Laboratory
2009-2014
University of California, Berkeley
2007-2014
Shanghai Institute of Applied Physics
2011
Tyndall Centre
2010
A pair to fret about: Biotinylated phosphor nanoparticles that emit upconversion luminescence have been taken with biotinylated Au nanoparticles, which act as energy acceptors, and the has applied determination of trace amounts avidin based on fluorescence resonant transfer (FRET; see picture).
In this perspective, we take a critical look at the research progress within nanowire community for past decade. We discuss issues on discovery of fundamentally new phenomena versus performance benchmarking many applications. also notice that both bottom-up and top-down approaches have played important roles in advancing our fundamental understanding class nanostructures. Finally attempt to into future offer personal opinions what trends will be research.
Nanocrystalline Ln3+-doped YF3 phosphors have been synthesized via a facile sonochemistry-assisted hydrothermal route. nanoparticles are demonstrated to be good host material for different lanthanides. Varying the dopants leads optical properties. In particular, feasibility of inducing red, green, and especially blue emission in Yb3+/Er3+ co-doped sample by up-conversion excitation near-infrared region is demonstrated. Such unusually strong 411 nm has seldom reported other Yb3+/Er3+-doped...
The fundamental understanding of the relationship between crystal structure and dynamic processes anisotropic growth on nanoscale, exploration key factors governing evolution physical properties in functional nanomaterials, have become two most urgent challenging issues fabrication exploitation nanomaterials with designed development nanoscale devices. Herein, we show how structural kinetic govern tendency for such materials under hydrothermal conditions, morphology influence optical...
The mechanism of tuning charge transport in electronic devices has recently been implemented into the nanofluidic field for active control ion nanoscale channels/pores. Here we report first synthesis longitudinal heterostructured SiO(2)/Al(2)O(3) nanotubes. ionic through these nanotube heterojunctions exhibits clear current rectification, a signature diode behavior. Such diodes could find applications separation and energy conversion.
Metallic nanoscale structures are capable of supporting surface plasmon polaritons (SPPs), propagating collective electron oscillations with tight spatial confinement at the metal surface. SPPs represent one most promising to beat diffraction limit imposed by conventional dielectric optics. Ag nano wires have drawn increasing research attention due 2D sub-100 nm mode and lower losses as compared fabricated structures. However, rational versatile integration nanowires other active passive...
Wearable piezoresistive sensors are being developed as electronic skins (E-skin) for broad applications in human physiological monitoring and soft robotics. Tactile with sufficient sensitivities, durability, large dynamic ranges required to replicate this critical component of the somatosensory system. Multiple micro/nanostructures, materials, sensing modalities have been reported address need. However, a trade-off arises between device performance complexity. Inspired by microstructure...
Sub-2-nm (down to one-unit cell) uniform oxide nanocrystals and highly ordered superstructures were obtained in one step using oleylamine oleic acid as capping structure directing agents. The cooperative nature of the nanocrystal growth assembly resulted mesoscopic one-dimensional ribbon-like made these ultrathin nanocrystals. process reported here is general can be readily extended production many other transition metal (TiO2, ZnO, Nb2O5) rare earth (Eu2O3, Sm2O3, Er2O3, Y2O3, Tb2O3, Yb2O3) systems.
Abstract Silver nanowires (AgNWs) hold great promise for applications in wearable electronics, flexible solar cells, chemical and biological sensors, photonic/plasmonic circuits, scanning probe microscopy (SPM) due to their unique plasmonic, mechanical, electronic properties. However, the lifetime, reliability, operating conditions of AgNW-based devices are significantly restricted by poor stability, limiting commercial potentials. Therefore, it is crucial create a reliable oxidation barrier...
Induziertes Paarungsverhalten: Biotinylierte phosphoreszierende Nanopartikel (PN), die eine aufwärtskonvertierte Lumineszenz emittieren, wurden in Kombination mit biotinylierten Au-Nanopartikeln, als Energieacceptoren wirken, zur Bestimmung von Avidinspuren durch resonanten Fluoreszenzenergietransfer eingesetzt (FRET; siehe Bild).
Complex rare earth fluoride (NaRF(4), R = Ce,Y,Gd) nanocrystals of 30-50 nm were synthesized by hydrothermal and solvothermal techniques. The size, morphology phase transition the complex fluorides are discussed as effects different solvents, reaction time temperature. Hexagonal NaRF(4) with good dispersibility can be prepared in presence EDTA using ethanol solvent. After doping Yb(3+), Er(3+); Tm(3+), Eu(3+), some typical up-conversion down-conversion photoluminescence was characterized discussed.
The tip-enhanced Raman spectroscopy (TERS) imaging technique is designed to provide correlated morphological and chemical information with a nanoscale spatial resolution by utilizing the plasmonic resonance supported metallic nanostructures at tip apex of scanning probe. However, limited scattering cross sections these nanostructures, only small fraction incident light can be coupled generate signals. uncoupled then directly excites background spectra diffraction-limited resolution, which...
This review summarizes recent advances in dielectric and plasmonic nanowire waveguides their hybridization towards better device performance.
Despite many efforts to fabricate high-aspect-ratio atomic force microscopy (HAR-AFM) probes for high-fidelity, high-resolution topographical imaging of three-dimensional (3D) nanostructured surfaces, current HAR still suffer from unsatisfactory performance, low wear-resistivity, and extravagant prices. The primary objective this work is demonstrate a novel design (HR) AFM probe, which fabricated through reliable, cost-efficient benchtop process precisely implant single ultrasharp metallic...
The rapid characterization of nanoparticles for morphological information such as size and shape is essential material synthesis they are the determining factors optical, mechanical, chemical properties related applications. In this paper, we report a computational imaging platform to characterize nanoparticle morphology under conventional optical microscopy. We established machine learning model based on series images acquired by through-focus scanning microscopy (TSOM) microscope. This...
Optical transmission and scattering spectroscopic microscopy at the visible adjacent wavelengths denote one of most informative inclusive characterization methods in material research. Unfortunately, restricted by diffraction limit light, it cannot resolve nanoscale variation light absorption scattering, diagnostics local inhomogeneity structure properties. Moreover, a large quantity nanomaterials has anisotropic optical properties that are appealing yet hard to characterize through...