scholarly journals A Review on Applications of Two-Dimensional Materials in Surface-Enhanced Raman Spectroscopy

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Ming Xia
Keyword(s):  
Raman Spectroscopy ◽  
2D Materials ◽  
Surface Enhanced Raman Spectroscopy ◽  
Great Promise ◽  
Two Dimensional ◽  
Raman Enhancement ◽  
Two Dimensional Materials ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Recent Developments

Two-dimensional (2D) materials, such as graphene and MoS2, have been attracting wide interest in surface enhancement Raman spectroscopy. This perspective gives an overview of recent developments in 2D materials’ application in surface-enhanced Raman spectroscopy. This review paper focuses on the applications of using bare 2D materials and metal/2D material hybrid substrate for Raman enhancement. The Raman enhancing mechanism of 2D materials will also be discussed. The progress covered herein shows great promise for widespread adoption of 2D materials in SERS application.

Surface-enhanced Raman spectroscopy chips based on two-dimensional materials beyond graphene

2021 ◽  
Vol 42 (5) ◽  
pp. 051001
Author(s):  
Enqing Zhang ◽  
Zhengkun Xing ◽  
Dian Wan ◽  
Haoran Gao ◽  
Yingdong Han ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Surface Enhanced Raman Spectroscopy ◽  
Two Dimensional ◽  
Two Dimensional Materials ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

Surface-Enhanced Raman Spectroscopy of Two-Dimensional Tin Diselenide Nanoplates

2018 ◽  
Vol 72 (11) ◽  
pp. 1613-1620 ◽  
Author(s):  
Mei Liu ◽  
Ying Shi ◽  
Guangping Zhang ◽  
Yongheng Zhang ◽  
Meimei Wu ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Charge Transfer ◽  
Optoelectronic Device ◽  
Surface Enhanced Raman Spectroscopy ◽  
Raman Signal ◽  
Two Dimensional ◽  
Raman Enhancement ◽  
Surface Enhanced ◽  
Device Integration ◽  
Surface Enhanced Raman

Surface-enhanced Raman spectroscopy (SERS) is a powerful spectroscopy technique to detect and characterize molecules at a very low concentration level. The two-dimensional (2D) semi-conductor layered material, tin diselenide (SnSe2), is used as a new substrate for enhancing the Raman signals of adsorbed molecules. Three kinds of molecules—Rhodamine 6G (R6G), crystal violet (CV), and methylene blue (MB)—are used as probe molecules to evaluate the SERS performance of SnSe2. The Raman signals of different molecules can be enhanced by SnSe2 nanoplates (NPs). The distinguishable Raman signal of R6G molecules can be obtained for adsorbent concentrations as low as 10−17 mol/L. Based on a detailed analysis of the bandgap structure and opto-electrical properties of SnSe2 NPs, we discuss the process of charge transfer and the Raman enhancement mechanism of SnSe2 NP. The high Raman sensitivity of SnSe2 NPs is related to the charge transfer between molecules and SnSe2, 2D layered structure, and indirect bandgap of few-layered SnSe2. The research results will help to expand the application of SnSe2 in microanalysis, improve the measurement accuracy of SERS, and possibly find use in optoelectronic device integration.

scholarly journals Surface Enhanced Raman Spectroscopy With Electrodeposited Copper Ultramicro-Wires With/Without Silver Nanostars Decoration

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 518
Author(s):  
Margherita Longoni ◽  
Maria Sole Zalaffi ◽  
Lavinia de Ferri ◽  
Angela Maria Stortini ◽  
Giulio Pojana ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Surface Enhanced Raman Spectroscopy ◽  
Anodized Aluminum ◽  
Anodized Aluminum Oxide ◽  
Electrochemical Preparation ◽  
Deposition Parameters ◽  
Raman Enhancement ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Materials Used

The electrochemical preparation of arrays of copper ultramicrowires (CuUWs) by using porous membranes as templates is critically revisited, with the goal of obtaining cheap but efficient substrates for surface enhanced Raman spectroscopy (SERS). The role of the materials used for the electrodeposition is examined, comparing membranes of anodized aluminum oxide (AAO) vs. track-etched polycarbonate (PC) as well as copper vs. glassy carbon (GC) as electrode material. A voltammetric study performed on bare electrodes and potentiostatic tests on membrane coated electrodes allowed the optimization of the deposition parameters. The final arrays of CuUWs were obtained by chemical etching of the template, with NaOH for AAO and CH2Cl2 for PC. After total etching of the template, SERS spectra were recorded on CuUWs using benzenethiol as SERS probe with known spectral features. The CuUW substrates displayed good SERS properties, providing enhancement factor in the 103–104 range. Finally, it was demonstrated that higher Raman enhancement can be achieved when CuUWs are decorated with silver nanostars, supporting the formation of SERS active hot-spots at the bimetallic interface.

HIGH-ORDERED AND ULTRA-SENSITIVE PARTICLE-IN-BOWL METALLIC ARRAYS FOR SURFACE ENHANCED RAMAN SPECTROSCOPY

NANO ◽  
2014 ◽  
Vol 09 (04) ◽  
pp. 1450050 ◽  
Author(s):  
DI DI ◽  
PEITAO DONG ◽  
CHAOGUANG WANG ◽  
JIAN CHEN ◽  
JUNFENG WANG ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Fdtd Method ◽  
Disease Diagnosis ◽  
Surface Enhanced Raman Spectroscopy ◽  
Excitation Wavelength ◽  
Raman Enhancement ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Em Field ◽  
Lift Off

High-ordered particle-in-bowl (PIB) arrays are developed in this paper for surface enhanced Raman spectroscopy (SERS). A heterogeneous shadow mask, composing of the chrome (Cr) layer and colloid residues, is used to fabricate the silicon ( Si ) template from where the PIB arrays finally lift-off. The finite difference time domain (FDTD) method is employed to investigate the Raman enhancement mechanism of this PIB architecture. The electromagnetic (EM) field tends to concentrate in the gap between the bowl and the particle forming the "hot spots". The enhancement factor (EF) of the EM field is about 70 with an excitation wavelength of 785 nm. The Raman measurements validate the EM calculation of the PIB arrays. The EF is about 1.12 × 107 using Rodamine 6G (R6G) as probe molecule. The proposed PIB array is high-ordered in morphology and ultra-sensitive in Raman measurement, providing an ideal substrate for SERS-based bio-chemical sensing, disease diagnosis and analytical chemistry.

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