title: Novel Strategy for One-Pot Synthesis of Gold Nanoplates on Carbon Nanotube Sheet As an Effective Flexible SERS Substrate.
abstract: In this work, we demonstrate a novel route for one-pot synthesis of two-dimensional gold nanoplates (2-D AuNPLs) on carbon nanotube (CNT) sheet. Well-defined AuNPLs are grafted onto CNT sheet via a facile hydrothermal reduction process, during which bromine ions are employed as the surfactant for gold anisotropic growth. Scanning electron microscopy (SEM) shows large-scale AuNPLs with micrometer-scaled length and sub-100 nm thickness are deposited uniformly on the CNT sheet. Transmission electron microscopy (TEM) and X-ray diffraction (XRD) results confirm the synthesized AuNPLs are single-crystalline with preferential {111} orientation. Based on the CNT sheet/AuNPLs hybrid, we have fabricated a flexible surface-enhanced Raman scattering (SERS) substrate, which can effectively detect the analyte Rhodamine 6G (Rh6G) at the concentration as low as 1 × 10-7M. The excellent SERS performance of this novel flexible substrate is mainly attributed to nanoscaled gaps between the neighbors, large surface area with roughness, and their sharp edges and corners.
authors.affiliation: Department of Materials Science and Engineering, University of California, Los Angeles , 410 Westwood Plaza, Los Angeles, California 90095, United States.
authors.forename: Wenbo
authors.identifier: http://orcid.org/0000-0001-6984-4242
authors.initials: W
authors.lastname: Xin
authors.affiliation: Department of Materials Science and Engineering, University of California, Los Angeles , 410 Westwood Plaza, Los Angeles, California 90095, United States.
authors.forename: Jenn-Ming
authors.initials: JM
authors.lastname: Yang
authors.affiliation: Department of Materials Science and Engineering, University of California, Los Angeles , 410 Westwood Plaza, Los Angeles, California 90095, United States.
authors.forename: Chao
authors.initials: C
authors.lastname: Li
authors.affiliation: Department of Materials Science and Engineering, University of California, Los Angeles , 410 Westwood Plaza, Los Angeles, California 90095, United States.
authors.forename: Mark S
authors.initials: MS
authors.lastname: Goorsky
authors.affiliation: Institute for Technology Advancement, University of California, Los Angeles , 410 Westwood Plaza, Los Angeles, California 90095, United States.
authors.forename: Larry
authors.initials: L
authors.lastname: Carlson
authors.affiliation: Department of Materials Science and Engineering, University of California, Los Angeles , 410 Westwood Plaza, Los Angeles, California 90095, United States.|Institute for Technology Advancement, University of California, Los Angeles , 410 Westwood Plaza, Los Angeles, California 90095, United States.
authors.forename: Igor M
authors.initials: IM
authors.lastname: De Rosa
keywords: carbon nanotube sheet; flexible SERS substrate; gold nanoplates; one-pot synthesis