Experimental and theoretical investigation on the vibrational spectroscopy of l-theanine

Chen, Yongjian; Xi, Gangqin; Chen, Rong; Li, Yongzeng; Feng, Shouhua; Lei, Jinping; Lin, Hongxing

doi:10.1016/j.molstruc.2011.10.002

Cited by 3 publications

(2 citation statements)

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“…However, the vibration frequency of each functional group or chemical bond is normally affected by many other factors, such as the other functional group, chemical bond, and external environment. (Chen, Xi, Chen, Li, Feng, Lei, et al, 2011) Fig.4(B) is the normal Raman spectrum of pure L-Theanine powder, as it shows that the peaks presenting at 1458 cm -1 , 1251 cm -1 , 1189 cm -1 , and 1416 cm -1 , respectively, which is consist to Chen et al report. (Chen, et al, 2011)And Fig.4(C) shows the SERS spectra of L-Theanine molecules adsorbed on the GO/Ag nanocomposites.…”

Section: Characterization Of the Go/ag Nanocompositessupporting

confidence: 76%

“…(Chen, Xi, Chen, Li, Feng, Lei, et al, 2011) Fig.4(B) is the normal Raman spectrum of pure L-Theanine powder, as it shows that the peaks presenting at 1458 cm -1 , 1251 cm -1 , 1189 cm -1 , and 1416 cm -1 , respectively, which is consist to Chen et al report. (Chen, et al, 2011)And Fig.4(C) shows the SERS spectra of L-Theanine molecules adsorbed on the GO/Ag nanocomposites. Obviously, there are significant differences between the two spectrums, indicating there are strong interactions between L-Theanine molecules and GO/Ag nanocomposites.…”

Section: Characterization Of the Go/ag Nanocompositessupporting

confidence: 76%

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Preparation of SERS-active substrates based on graphene oxide/silver nanocomposites for rapid zdetection of l-Theanine

Zheng

et al. 2017

Food Chemistry

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A kind of graphene oxide/silver (GO/Ag) nanocomposites with high Surface enhanced Raman scattering (SERS) activity were fabricated via a facile and green liquid phase reduction method. The synthesized materials were characterized in detail using various microscopic and spectroscopic techniques. In this method, the GO sheets worked as a holder which makes silver nanoparticles (AgNPs) aggregate to a particular morphology, and under a suitable dosage of silver ions, well-dispersed AgNPs on the surface of GO were obtained, which could generate more "hot spots" of SERS. Moreover, SERS technique based on the obtained GO/Ag nanocomposites was used as an effective way to detect l-Theanine. The detection limit was estimated to be as low as 10(-7)M, and a multivariate linear regression model for the concentration of l-Theanine was established. The optimal fitting equation is Y=5.6765+0.0307X1458-0.0267X1251.

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Section: Characterization Of the Go/ag Nanocompositessupporting

confidence: 76%

Section: Characterization Of the Go/ag Nanocompositessupporting

confidence: 76%