期刊
CHEMICAL SCIENCE
卷 9, 期 7, 页码 1769-1773出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7sc04884j
关键词
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资金
- National Science Foundation [CHE-1505385, CHE-1506273]
- University of Michigan
- Direct For Mathematical & Physical Scien [1506273] Funding Source: National Science Foundation
- Division Of Chemistry [1506273] Funding Source: National Science Foundation
Two-dimensional (2D) materials such as graphene, molybdenum disulfide (MoS2), tungsten diselenide (WSe2), and black phosphorous are being developed for sensing applications with excellent selectivity and high sensitivity. In such applications, 2D materials extensively interact with various analytes including biological molecules. Understanding the interfacial molecular interactions of 2D materials with various targets becomes increasingly important for the progression of better-performing 2D-material based sensors. In this research, molecular interactions between several de novo designed alpha-helical peptides and monolayer MoS2 have been studied. Molecular dynamics simulations were used to validate experimental data. The results suggest that, in contrast to peptide-graphene interactions, peptide aromatic residues do not interact strongly with the MoS2 surface. It is also found that charged amino acids are important for ensuring a standing-up pose for peptides interacting with MoS2. By performing site-specific mutations on the peptide, we could mediate the peptide-MoS2 interactions to control the peptide orientation on MoS2.
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