Hydrothermal reduction of graphene oxide; effect on surface‐enhanced Raman scattering

Zheng, Xianliang; Peng, Yujia; Yang, Yan; Chen, Jianli; Tian, Hongwei; Cui, Xiaoqiang; Zheng, Weitao

doi:10.1002/jrs.4998

Cited by 75 publications

(26 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[11][12][13][14][15][16] Optical spectroscopies, such as photoluminescence (PL) and Raman measurements, are useful tools for studying disorders in two-dimensional materials that may limit their applications as high-performance devices. [17][18][19][20][21][22][23][24][25] Changes in the Raman spectra of graphene with increasing defects have been studied in detail; for example, defect-activated Raman peaks (D-and D′-peak) have been used to probe defect type and density. [26][27][28] On the other hand, rather than with Raman spectra, creation of defects in monolayer MoS 2 can be significantly reflected in the † These authors contributed equally to this work.…”

Section: Introductionmentioning

confidence: 99%

Changes in the Raman spectra of monolayer MoS₂ upon thermal annealing

Kim

Jung

et al. 2018

J Raman Spectroscopy

View full text Add to dashboard Cite

Defects have crucial effects on the electronic and optoelectronic properties of two‐dimensional materials. In this work, we measured the changes in the Raman spectra and electrical conductance of monolayer molybdenum disulfide (MoS2) with increasing defects via thermal annealing in a reducing atmosphere. Raman spectra of the basal plane MoS2 on SiO2 differed from those of the edge and revealed intricate changes upon annealing up to 550°C due to the substitution of adsorbed molecules and the creation of highly concentrated defects. On the other hand, MoS2 on hexagonal boron nitride (h‐BN) presented homogenous Raman spectra over the entire area and showed no noticeable changes in its Raman spectra upon annealing. For MoS2 on h‐BN, the charge transfer between MoS2 and adsorbed molecules and the number of defects created by annealing up to 550°C are not sufficient to change the Raman spectra. The distinct behaviors of the two sample spectra are ascribed to different substrate‐induced doping and interfacial adhesion strengths.

show abstract

Section: Introductionmentioning

confidence: 99%

Changes in the Raman spectra of monolayer MoS₂ upon thermal annealing

Kim

Jung

et al. 2018

J Raman Spectroscopy

View full text Add to dashboard Cite

show abstract

“…It is clear that all of the samples exhibited a D band and a G band at approximately 1345 and 1590 cm −1 , respectively [ 25 ]. Generally, the ratio of the G - and D - band intensity ( I G / I D ) in normal Raman spectra of GO and CRGO can be used to estimate the average size of sp 2 carbon domain, and the higher ratio of I G / I D indicates the larger average size of sp 2 carbon domain [ 17 ]. Although the total area of the sp 2 domains of CRGO films increased after reduction as mentioned above, because of the increasing defective carbon domains that were generated after the removal of oxygen-containing groups, the size of each sp 2 domain of CRGO decreased, which destroyed the π-conjugation of the substrate.…”

Section: Resultsmentioning

confidence: 99%

“…Owing to high adsorption capacity, fluorescent quenching, and Raman scattering enhancement, graphene has been demonstrated to be a SERS substrate [ 14 , 15 , 16 ]. To date, graphene, graphene oxide (GO), and graphene nanocomposites were used to enhance Raman spectra [ 15 , 17 , 18 ]. However, the literature offers some contrasting views on the SERS activity of graphene.…”

Section: Introductionmentioning

confidence: 99%

Strong Dependence of Surface Enhanced Raman Scattering on Structure of Graphene Oxide Film

2018

View full text Add to dashboard Cite

Graphene and its derivatives have been demonstrated to be good surface-enhanced Raman scattering (SERS) substrates. However, the literature offers some contrasting views on the SERS effect of graphene-based materials. Thus, understanding the mechanism of the SERS enhancement of graphene is essential for exploring its application as a SERS substrate. In this study, graphene oxide (GO) and chemically reduced graphene oxide (CRGO) films with different morphologies and structures were prepared and applied as SERS substrates to detect Raman dye molecules. The observed enhancement factors can be as large as 10~103. The mechanism of SERS enhancement is discussed. It is shown that the SERS effect was independent of the adsorption of dye molecules and the surface morphologies of graphene-based films. Raman shifts are observed and are almost the same on different graphene-based films, indicating the existence of charge transfer between dye molecules and substrates. The Raman enhancement factors and sensitivities of dye molecules on different films are consistently within the IG/ID ratios of graphene-based substrates, indicating that the dramatically enhanced Raman spectra on graphene-based films are strongly dependent on the average size of sp2 carbon domain.

show abstract

“…Both GO and reduced GO (RGO) were used as SERS substrates, and their SERS activities were studied and compared. The mechanism of SERS enhancement of GO and RGOs was discussed . Zhou et al reported the vibrational properties of layered BiTeCl single crystal.…”

Section: Nannomaterialsmentioning

confidence: 99%

“…The mechanism of SERS enhancement of GO and RGOs was discussed. [88] Zhou et al reported the vibrational properties of layered BiTeCl single crystal. By using excitation lasers of 488, 514, 647, and 785 nm, they found that the Raman modes of BiTeCl are nondispersive, and their work provides valuable lattice vibrational and thermal information about BiTeCl for its integration into the emerging 2D nano devices as a promising polar-layered material.…”

Section: Carbon Nanotubes Carbon Materials Graphene Layered Solimentioning

confidence: 99%

Recent advances in linear and nonlinear Raman spectroscopy. Part XII

Nafie

2018

J Raman Spectroscopy

View full text Add to dashboard Cite

This annual review is an overview of advances in the field of Raman spectroscopy as found in papers published in the previous calendar year in the Journal of Raman Spectroscopy (JRS), as well as in trends over the past decade across journals that have published papers important to the field of Raman spectroscopy. This information is gleaned from statistical data on article counts obtained from the Clarivate Analytic's Web of Science Core Collection by year and by subfield of Raman spectroscopy. Additional information is gleaned from presentations at the XXVI International Conference on Raman Spectroscopy (ICORS 2018) in Jeju Island, Korea in August 2018, and contributions on Raman scattering at SCIX 2018, organized by the Federation of Analytical Chemistry and Spectroscopy Societies (FACSS) in Atlanta, Georgia, USA in October 2018. Coverage is also provided for topics from the European Conference on Nonlinear Optical Spetroscopy (ECONOS 2018) held in April in Milan, Italy and GeoRaman 2018 in Catania, Italy in June. Finally, papers published in JRS in 2017 are highlighted and arranged by topics at the frontier of Raman spectroscopy. On the basis of this survey information, it is clear that Raman spectroscopy continues as in recent years as a rapidly expanding field of research across a wide range of novel disciplines and applications that provide sensitive photonic information of matter at the molecular level.

show abstract

Hydrothermal reduction of graphene oxide; effect on surface‐enhanced Raman scattering

Cited by 75 publications

References 54 publications

Changes in the Raman spectra of monolayer MoS₂ upon thermal annealing

Changes in the Raman spectra of monolayer MoS₂ upon thermal annealing

Strong Dependence of Surface Enhanced Raman Scattering on Structure of Graphene Oxide Film

Recent advances in linear and nonlinear Raman spectroscopy. Part XII

Contact Info

Product

Resources

About

Hydrothermal reduction of graphene oxide; effect on surface‐enhanced Raman scattering

Cited by 75 publications

References 54 publications

Changes in the Raman spectra of monolayer MoS2 upon thermal annealing

Changes in the Raman spectra of monolayer MoS2 upon thermal annealing

Strong Dependence of Surface Enhanced Raman Scattering on Structure of Graphene Oxide Film

Recent advances in linear and nonlinear Raman spectroscopy. Part XII

Contact Info

Product

Resources

About

Changes in the Raman spectra of monolayer MoS₂ upon thermal annealing

Changes in the Raman spectra of monolayer MoS₂ upon thermal annealing