Journal
JAPANESE JOURNAL OF APPLIED PHYSICS
Volume 58, Issue 5, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.7567/1347-4065/ab0b37
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- JST CREST [JPMJCR15F4]
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In this study, we examined phosphorylcholine (ChoP)-modified epitaxial graphene film based devices for the suppression of non-specific protein adsorptions onto a graphene surface. ChoP-pyrene derivatives were synthesized and immobilized on epitaxial graphene by the pi-pi stacking effect. The shifts in the transfer curve by protein adsorption were suppressed for the ChoP-modified graphene device, and this effect was independent of the charge and type of protein. In addition, the suppression effect was stable after 15 min of treatment with ultra-pure water owing to strong interactions of pi electrons on the graphene surface. Consequently, our results indicate a stable blocking for protein adsorptions is achieved with an epochal ChoP derivative using robust bonding of a pyrene and a graphene film. (c) 2019 The Japan Society of Applied Physics
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