Peptide-Programmable Nanoparticle Superstructures with Tailored Electrocatalytic Activity

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Title
Peptide-Programmable Nanoparticle Superstructures with Tailored Electrocatalytic Activity
Author(s)
Eun Sung Kang; Yong-Tae Kim; Young-Seon Ko; Nam Hyeong Kim; Geonhee Cho; Yang Hoon Huh; Ji-Hun Kim; Jiyoung Nam; Trung Thanh Thach; David Youn; Young Dok Kim; Wan Soo Yun; William F. DeGrado; Sung Yeol Kim; Paula T. Hammond; Jaeyoung Lee; Young-Uk Kwon; Don-Hyung Ha; Yongho Kim
Publication Date
2018-07
Journal
ACS NANO, v.12, no.7, pp.6554 - 6562
Publisher
AMER CHEMICAL SOC
Abstract
Biomaterials derived via programmable supramolecular protein assembly provide a viable means of constructing precisely defined structures. Here, we present programmed superstructures of AuPt nanoparticles (NPs) on carbon nanotubes (CNTs) that exhibit distinct electrocatalytic activities with respect to the nanoparticle positions via rationally modulated peptide mediated assembly. De novo designed peptides assemble into six helix bundles along the CNT axis to form a suprahelical structure. Surface cysteine residues of the peptides create AuPt-specific nucleation site, which allow for precise positioning of NPs onto helical geometries, as confirmed by 3-D reconstruction using electron tomography. The electrocatalytic model system, i.e., AuPt for oxygen reduction, yields electrochemical response signals that reflect the controlled arrangement of NPs in the intended assemblies. Our design approach can be expanded to versatile fields to build sophisticated functional assemblies. (c)2018 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/5244
ISSN
1936-0851
Appears in Collections:
Center for Neuroscience Imaging Research (뇌과학 이미징 연구단) > Journal Papers (저널논문)
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