Charge transfer-induced enhancement of a Raman signal in a hybrid Ag–GaN nanostructure

Upadhyaya, Kishor; Sharvani, S; Ayachit, N. H.; Shivaprasad, S. M.

doi:10.1039/c9ra04097h

Cited by 6 publications

(1 citation statement)

References 37 publications

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“…[34] This is also supported by a previous study, which reported charge transfer from GaN to Ag and a resultant increase of the surface charge density of Ag. [35] Our X-ray photoelectron spectroscopy (XPS) analysis results in Figure 3f further corroborate the electron transfer between GaN and Ag. The XPS peaks for the Ga 2p and N 1s orbitals of the AoG structure shift toward a higher binding energy level compared to that of bare GaN NP.…”

Section: Characterization Of the Aog Structuresupporting

confidence: 70%

Synergistic SERS Enhancement in GaN‐Ag Hybrid System toward Label‐Free and Multiplexed Detection of Antibiotics in Aqueous Solutions

et al. 2021

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Noble metal-based surface-enhanced Raman spectroscopy (SERS) has enabled the simple and efficient detection of trace-amount molecules via significant electromagnetic enhancements at hot spots. However, the small Raman cross-section of various analytes forces the use of a Raman reporter for specific surface functionalization, which is time-consuming and limited to low-molecular-weight analytes. To tackle these issues, a hybrid SERS substrate utilizing Ag as plasmonic structures and GaN as charge transfer enhancement centers is presented. By the conformal printing of Ag nanowires onto GaN nanopillars, a highly sensitive SERS substrate with excellent uniformity can be fabricated. As a result, remarkable SERS performance with a substrate enhancement factor of 1.4 × 10 11 at 10 fM for rhodamine 6G molecules with minimal spot variations can be realized. Furthermore, quantification and multiplexing capabilities without surface treatments are demonstrated by detecting harmful antibiotics in aqueous solutions. This work paves the way for the development of a highly sensitive SERS substrate by constructing complex metal-semiconductor architectures.

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Section: Characterization Of the Aog Structuresupporting

confidence: 70%

Synergistic SERS Enhancement in GaN‐Ag Hybrid System toward Label‐Free and Multiplexed Detection of Antibiotics in Aqueous Solutions

et al. 2021

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Comparison of optoelectronic properties of epitaxial and non-epitaxial GaN nanostructures

Upadhyaya

Ayachit

Shivaprasad

2020

J Mater Sci: Mater Electron

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Synergistic effects of Ag nanoparticles in the rGO and Co3O4 based electrode materials for asymmetric supercapacitors

Kalia,

Choudhary,

Shrivastav

et al. 2024

Electrochimica Acta

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Charge transfer-induced enhancement of a Raman signal in a hybrid Ag–GaN nanostructure

Abstract: The optical properties and electronic band structure of Ag nanoparticles dispersed on a GaN nanowall network were studied. High metal like surface conductivity was revealed, and charge transfer between Ag and GaN was involved in the enhancement of Raman signals.

Cited by 6 publications

References 37 publications

Synergistic SERS Enhancement in GaN‐Ag Hybrid System toward Label‐Free and Multiplexed Detection of Antibiotics in Aqueous Solutions

Synergistic SERS Enhancement in GaN‐Ag Hybrid System toward Label‐Free and Multiplexed Detection of Antibiotics in Aqueous Solutions

Comparison of optoelectronic properties of epitaxial and non-epitaxial GaN nanostructures

Synergistic effects of Ag nanoparticles in the rGO and Co3O4 based electrode materials for asymmetric supercapacitors

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