石墨烯
化学吸附
芳香族氨基酸
材料科学
氨基酸
色氨酸
拉曼光谱
酪氨酸
电子转移
光化学
吸附
有机化学
化学
纳米技术
生物化学
光学
物理
作者
Sai Sunil Kumar Mallineni,Jonathan H. Shannahan,Achyut J. Raghavendra,Apparao M. Rao,Jared M. Brown,Ramakrishna Podila
标识
DOI:10.1021/acsami.6b04571
摘要
The present work experimentally investigates the interaction of aromatic amino acids viz., tyrosine, tryptophan, and phenylalnine with novel two-dimensional (2D) materials including graphene, graphene oxide (GO), and boron nitride (BN). Photoluminescence, micro-Raman spectroscopy, and cyclic voltammetry were employed to investigate the nature of interactions and possible charge transfer between 2D materials and amino acids. Graphene and GO were found to interact strongly with aromatic amino acids through π-π stacking, charge transfer, and H-bonding. Particularly, it was observed that both physi and chemisorption are prominent in the interactions of GO/graphene with phenylalanine and tryptophan while tyrosine exhibited strong chemisorption on graphene and GO. In contrast, BN exhibited little or no interactions, which could be attributed to localized π-electron clouds around N atoms in BN lattice. Lastly, the adsorption of amino acids on 2D materials was observed to considerably change their biological response in terms of reactive oxygen species generation. More importantly, these changes in the biological response followed the same trends observed in the physi and chemisorption measurements.
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