Increased chemical enhancement of Raman spectra for molecules adsorbed on fluorinated reduced graphene oxide

Yu, Xinxin; Lin, Kui; Qiu, Keqiang; Cai, Haiwen; Li, Xinjing; Liu, Jinyang; Pan, Nan; Fu, Shaojun; Luo, Yi; Wang, Xiaoping

doi:10.1016/j.carbon.2012.05.033

Cited by 51 publications

(42 citation statements)

References 25 publications

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“…A study used GO-based SERS substrate to acquire Raman spectra of rodamine, melamine, and cephalexin, 21 but the results showed a weak enhancement of SERS due to CM of graphene. 21 This same conclusion was also reached in another study by Yu et al 28 In our study, we observed that the main SERS enhancer still relied on the EM of noble metal nanostructures. This is consistent with another study 30 using fabricated Ag or AuNPsdecorated rGO on Si substrate as an efficient SERS substrate to detect aromatic molecules with a low detection limit at the nanomolar level.…”

Section: ■ Results and Discussionsupporting

confidence: 90%

Use of Graphene and Gold Nanorods as Substrates for the Detection of Pesticides by Surface Enhanced Raman Spectroscopy

Nguyen

Zhong

Mustapha

et al. 2014

J. Agric. Food Chem.

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This study aimed to use gold nanorods and graphene as key materials to fabricate high-performance substrates for the detection of pesticides by surface enhanced Raman spectroscopy (SERS). Three types of pesticides (azinphos-methyl, carbaryl, and phosmet) were selected. Gold nanorods have great potential to be used as a SERS substrate because it is easy to tune the surface plasmon resonance of the nanorods to the laser excitation wavelength of Raman spectroscopy. Graphene is a promising nanoscale material that can be used for supporting metal nanostructures. Three types of novel SERS substrates were fabricated, including graphene-gold film-gold nanorod (G-Au-AuNR) substrate, gold film-gold nanorod (Au-AuNR) substrate, and graphene coupled with gold nanorods (G-AuNR). The results demonstrate that G-Au-AuNR substrates exhibited the strongest Raman signals of the selected pesticides, followed by the Au-AuNR substrates. G-AuNR exhibited the weakest Raman signals, and no characteristic spectral features of the analytes were obtained. A partial least-squares method was used to develop quantitative models for the analysis of spectral data (R = 0.94, 0.87, and 0.86 for azinphos-methyl, carbaryl, and phosmet, respectively). The G-Au-AuNRs substrate was able to detect all three types of pesticides at the parts per million level with limits of detection at around 5, 5, and 9 ppm for azinphos-methyl, carbaryl, and phosmet, respectively. These results indicate that combining gold nanorods and graphene has great potential in the fabrication of sensitive, lightweight, and flexible substrates for SERS applications to improve food safety.

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Section: ■ Results and Discussionsupporting

confidence: 90%

Use of Graphene and Gold Nanorods as Substrates for the Detection of Pesticides by Surface Enhanced Raman Spectroscopy

Nguyen

Zhong

Mustapha

et al. 2014

J. Agric. Food Chem.

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“…[ 17 ] In this work, we observe an improved Raman enhancement of Rhodamine 6G (R6G) molecules deposited on oxygen-plasma treated MoS 2 (OT-MoS 2 ) and argonplasma treated MoS 2 (AT-MoS 2 ) nanofl akes. Compared with the intensity of Raman spectra of R6G on pristine MoS 2 (P-MoS 2 ) nanofl akes, it is found that the Raman intensities of R6G molecules on both oxygen and argon plasma treated MoS 2 (T-MoS 2 ) are enhanced more than one order.…”

mentioning

confidence: 94%

“…According to the previous reports, structural disorder can usually introduce local dipoles leading to www.small-journal.com the improved SERS effect. [15][16][17] As 1L MoS 2 is only ∼0.65 nm thick, its structure is easily modifi ed during plasma treatment (bombardment) process, thus the generated structural disorder induced local dipole in 1L MoS 2 should be the driven force for enhancing Raman signals of R6G molecules. Next, we will reveal the SERS mechanism by studying the surface properties of the plasma treated MoS 2 samples in detail.…”

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confidence: 99%

Plasma Modified MoS₂ Nanoflakes for Surface Enhanced Raman Scattering

Sun

Zhan

et al. 2014

Small

141

131

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Though the SERS effect based on pristine MoS2 is hardly observed, however, the plasma treated MoS2 nanoflakes can be used as an ideal substrate for surface enhanced Raman scattering. It is proved that the structural disorder induced generation of local dipoles and adsorption of oxygen on the plasma treated MoS2 nanosheets are the two basic and important driven forces for the enhancement of Raman signals of surface adsorbed R6G molecules.

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“…Plasmas of carbon tetrafluoromethane (CF 4 ) and sulfur hexafluoride (SF 6 ) are more often used for the fluorination of GO by plasma [8,[52][53][54]. In [8], the effect of plasma treatment of SF 6 and CF 4 ions on GO in the structure of an organic solar cell was investigated by methods of Raman spectroscopy, XPS, ultraviolet (UV) and infrared (IR) spectroscopy, and photoelectric characteristics measurements.…”

Section: Plasma Fluorinationmentioning

confidence: 99%

Plasma Treatment of Graphene Oxide

Neustroev¹

2018

Graphene Oxide - Applications and Opportunities

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Plasma treatment of graphene oxide (GO) is of interest for many applications such as gas sensors, flexible electrodes, biological applications, supercapacitors, batteries, etc. Plasma treatment is a high-tech process of processing materials in combination with efficiency, economy and environmental friendliness. At the same time, plasma treatments can lead to an increase in the defectiveness of the surface of GO. Therefore, it is important to know how the treatment in various gas media affects the properties of GO. This is necessary for the correct selection of processing parameters in order to reduce the negative impact of plasma treatment. The review presents the results of experimental studies of the effect of plasma in gases of oxygen, nitrogen, ammonia, sulfur hexafluoride, carbon tetrafluoromethane, hydrogen and methane on the properties of GO. Plasma treatments were used for the functionalization, reduction, doping of graphene oxide, and also for the obtaining GO from graphene by oxidation in oxygen plasma. The effects of plasma treatment are largely determined by the type of ions used and processing conditions: plasma power, processing time and temperature, pressure, as well as the location of the samples in the reaction chamber and their distance from the plasma ignition zone.

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Increased chemical enhancement of Raman spectra for molecules adsorbed on fluorinated reduced graphene oxide

Cited by 51 publications

References 25 publications

Use of Graphene and Gold Nanorods as Substrates for the Detection of Pesticides by Surface Enhanced Raman Spectroscopy

Use of Graphene and Gold Nanorods as Substrates for the Detection of Pesticides by Surface Enhanced Raman Spectroscopy

Plasma Modified MoS₂ Nanoflakes for Surface Enhanced Raman Scattering

Plasma Treatment of Graphene Oxide

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Increased chemical enhancement of Raman spectra for molecules adsorbed on fluorinated reduced graphene oxide

Cited by 51 publications

References 25 publications

Use of Graphene and Gold Nanorods as Substrates for the Detection of Pesticides by Surface Enhanced Raman Spectroscopy

Use of Graphene and Gold Nanorods as Substrates for the Detection of Pesticides by Surface Enhanced Raman Spectroscopy

Plasma Modified MoS2 Nanoflakes for Surface Enhanced Raman Scattering

Plasma Treatment of Graphene Oxide

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Product

Resources

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Plasma Modified MoS₂ Nanoflakes for Surface Enhanced Raman Scattering