Guoqiang Fang

ORCID: 0000-0002-8244-7337
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About
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Research Areas
  • Gold and Silver Nanoparticles Synthesis and Applications
  • Biosensors and Analytical Detection
  • Spectroscopy and Chemometric Analyses
  • Perovskite Materials and Applications
  • Spectroscopy Techniques in Biomedical and Chemical Research
  • Quantum Dots Synthesis And Properties
  • Luminescence Properties of Advanced Materials
  • Advanced biosensing and bioanalysis techniques
  • Plasmonic and Surface Plasmon Research
  • Advanced Chemical Sensor Technologies
  • Identification and Quantification in Food
  • Pickering emulsions and particle stabilization
  • Metabolomics and Mass Spectrometry Studies
  • Nanoplatforms for cancer theranostics
  • Advanced Photocatalysis Techniques
  • Electrochemical Analysis and Applications
  • Gas Sensing Nanomaterials and Sensors
  • Anomaly Detection Techniques and Applications
  • Photonic Crystals and Applications
  • EEG and Brain-Computer Interfaces
  • Currency Recognition and Detection
  • Water Quality Monitoring and Analysis
  • Transition Metal Oxide Nanomaterials
  • MXene and MAX Phase Materials
  • Nanocluster Synthesis and Applications

Harbin Institute of Technology
2022-2025

State Ethnic Affairs Commission
2020-2025

Dalian Minzu University
2020-2025

First Affiliated Hospital of Xinjiang Medical University
2021

Xinjiang Medical University
2021

Dalian Maritime University
2019-2021

Dalian University
2020

Interfacial self-assembly is a powerful technology for preparing large scale nanoparticle monolayers, but fabrication of highly repeatable monolayers remains challenge. Here we develop an oil/water/oil (O/W/O) three-phase system based on the Marangoni effect to fabricate reproducible monolayers. Nanoparticles could be easily transferred and compressed from lower O/W interface upper due interfacial tension gradient. The O/W/O can constructed using different kinds organic solvents. Through...

10.1021/acs.jpclett.0c01116 article EN The Journal of Physical Chemistry Letters 2020-04-15

Abstract Owing to its high sensitivity, surface‐enhanced Raman scattering (SERS) has immense potential for the identification of lung cancer from variation in volatile biomarkers exhaled gas. However, two prevailing factors limit application SERS: 1) adsorption target molecules into SERS hotspots and 2) detection specificity multiple interference environments. To improve density hotspots, 3D Au@Ag‐Au particles are prepared a porous nanoframes (PPFs) based plasmonic structure, which...

10.1002/smll.202408670 article EN Small 2025-01-07

The surface-enhanced Raman scattering (SERS) technique with ultrahigh sensitivity has gained attention to meet the increasing demands for food safety analysis. integration of machine learning and SERS facilitates practical applicability sensing devices. In this study, a learning-driven 3D plasmonic cavity-in-cavity (CIC) platform is proposed sensitive quantitative detection antibiotics. prepared by transferring truncated concave nanocubes (NCs) an obconical-shaped template surface. Owing...

10.1002/smll.202204588 article EN Small 2022-09-26

Surface-enhanced Raman scattering (SERS) is a highly sensitive tool in the field of environmental testing. However, detection and accurate quantification weakly adsorbed molecules (such as heavy metal ions) remain challenge. Herein, we combine clean SERS substrates capable capturing ions with convolutional neural network (CNN) algorithm models for quantitative solution. The substrate consists surfactant-free Au nanoparticles (NPs) l-cysteine molecules. As plasmonic nanobuilt blocks, NPs...

10.1021/acs.jpclett.3c01969 article EN The Journal of Physical Chemistry Letters 2023-08-10

Astragalus is an economically significant medicinal plant widely utilized in traditional medicine due to its remarkable immunomodulatory, anticancer, and antiviral properties. In this study, we propose innovative approach that combines spectroscopic techniques (Raman spectroscopy Fourier Transform Infrared Spectroscopy, FTIR) with Principal Component Analysis Support Vector Machine (PCA-SVM), Convolutional Neural Networks (CNNs) for the precise classification identification of different...

10.1364/opticaopen.28693457.v1 preprint EN cc-by 2025-04-01

Astragalus is an economically significant medicinal plant widely utilized in traditional medicine due to its remarkable immunomodulatory, anticancer, and antiviral properties. In this study, we propose innovative approach that combines spectroscopic techniques (Raman spectroscopy Fourier Transform Infrared Spectroscopy, FTIR) with Principal Component Analysis Support Vector Machine (PCA-SVM), Convolutional Neural Networks (CNNs) for the precise classification identification of different...

10.1364/opticaopen.28693457 preprint EN cc-by 2025-04-01

A dual detection method for R6G using SERS signal monitoring and fluorescence sensing based on LSPR of Au/W<sub>18</sub>O<sub>49</sub>.

10.1039/c9ta13466b article EN Journal of Materials Chemistry A 2020-01-01

The self-assembly of plasmonic nanoparticles into highly ordered superlattices could pave the way toward novel nanomaterials for surface-enhanced Raman scattering (SERS). Here, we propose formation large-area elongated rhombic dodecahedra in a vertical orientation via controlled droplet evaporation process. Expectedly, constant humidity experimental condition control speed droplets and this procedure promotes balance between driven depletion attraction electrostatic repulsion system, leading...

10.1021/acsami.0c17471 article EN ACS Applied Materials & Interfaces 2020-12-04

Abstract The overall optical efficiency of backlight-based liquid crystal displays (LCDs) is less than 5% due to the loss backlight source by polarizers, color filter, layer and so on. Self-emissive light emitting diodes (LEDs) have been undergoing huge development their substantial market potentials meet demand future display. More importantly, polarized LEDs could enhance energy utilization avoiding caused polarizers. Therefore, it desirable look for effective methods assemble high-quality...

10.1007/s40843-022-2313-1 article EN cc-by Science China Materials 2023-02-03

Lanthanide-doped upconversion nanoparticles (UCNPs) are rising as prospect nanomaterials for constructing polarization-sensitive narrowband near-infrared (NIR) photodetectors (PDs), which have attracted significant interest in astronomy, object identification, and remote sensing. However, polarized NIR photodetection imaging based on UCNPs yet to be realized. Herein, we demonstrate that capable of sensing light well affording wavelength-selective detection at 1550 nm by integrating...

10.1021/acsami.2c14127 article EN ACS Applied Materials & Interfaces 2022-10-31

Drug abuse is a global social issue of concern. As the drug market expands, there an urgent need for technological methods to rapidly detect meet needs different situations. Here, we present strategy rapid identification benzodiazepines (midazolam and diazepam) using surface-enhanced Raman scattering (SERS) combined with neural networks (CNN). The method uses self-assembled silver nanoparticle paper-based SERS substrate detection. Then, spectrum intelligent recognition model based on deep...

10.1039/d2an01277d article EN The Analyst 2022-01-01

Abstract Local optical field modulation using plasmonic materials or photonic crystals provides a powerful strategy for enhancing upconversion emission of lanthanide‐doped nanocrystals (UCNPs). However, it is restricted to static UC enhancement and the corresponding dynamic yet be reported, limiting its practical applications in information devices. Here, system reported through electric stimulation by integrating UCNPs with electrically sensitive WO 3−x (PPCs). The tunable varying from five...

10.1002/adfm.202304045 article EN Advanced Functional Materials 2023-07-14

Abstract The nanoparticle density (PD) of the substrates is crucial for surface‐enhanced Raman scattering (SERS) performance. Here, bottom‐up SERS based on rough gold nanorods (R‐Au NRs) with different PD are fabricated and their property investigated. In particular, R‐Au NRs deposited Si wafer from sparse to dense through electrostatic interaction monolayer multiple layers by interface self‐assembly technique. It found that intensity increases dramatically increasing remains almost...

10.1002/admi.202100412 article EN Advanced Materials Interfaces 2021-05-24

The plasmon coupling properties of assembled metal nanogap structures are highly sensitive to the distance, shape, orientation, and configuration faceted nanoparticles. However, orientation control nanoparticles is usually limited in-plane configurations. In this paper, Au@Ag nanocubes (NCs) with sharp edges corners were on a polystyrene (PS) microsphere array as hierarchical surface-enhanced Raman spectroscopy (SERS) substrate via facile self-assembly technique. NC monolayer undergoes an...

10.1021/acsanm.3c04414 article EN ACS Applied Nano Materials 2023-12-13
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