Highly Enhanced Raman Scattering on Carbonized Polymer Films

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Title
Highly Enhanced Raman Scattering on Carbonized Polymer Films
Author(s)
Jong-Chul Yoon; Jongha Hwang; Pradheep Thiyagarajan; Rodney S. Ruoff; Ji-Hyun Jang
Publication Date
2017-06
Journal
ACS APPLIED MATERIALS & INTERFACES, v.9, no.25, pp.21457 - 21463
Publisher
AMER CHEMICAL SOC
Abstract
We have discovered a carbonized polymer film to be a reliable and durable carbon-based substrate for carbon enhanced Raman scattering (CERS). Commercially available SU8 was spin coated and carbonized (c-SU8) to yield a film optimized to have a favorable Fermi level position for efficient charge transfer, which results in a significant Raman scattering enhancement under mild measurement conditions. A highly sensitive CERS (detection limit of 10(-8) M) that was uniform over a large area was achieved on a patterned c-SU8 film and the Raman signal intensity has remained constant for 2 years. This approach works not only for the CMOS-compatible c-SU8 film but for any carbonized film with the correct composition and Fermi level, as demonstrated with carbonized-PVA (poly(vinyl alcohol)) and carbonized-PVP (polyvinylpyrollidone) films. Our study certainly expands the rather narrow range of Raman-active material platforms to include robust carbon-based films readily obtained from polymer precursors. As it uses broadly applicable and cheap polymers, it could offer great advantages in the development of practical devices for chemical/bio analysis and sensors © 2017 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/4801
ISSN
1944-8244
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > Journal Papers (저널논문)
Files in This Item:
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