• Title/Summary/Keyword: Non-covalent functionalization

Search Result 3, Processing Time 0.02 seconds

Bio-functionalization of the Single Layer Graphene for Detecting the Cancer Cell

  • Oh, Hyung Sik;Park, Wanjun
    • Proceedings of the Korean Vacuum Society Conference
    • /
    • 2014.02a
    • /
    • pp.429.1-429.1
    • /
    • 2014
  • We present a method of surface functionalization of a single layer graphene for linking and detecting MDA-MB-231 human breast cancer cell. The methodology is done by utilizing 1-pyrenebutanoic acid and succinimidyl ester for immobiling CD44 antibodies. This work shows that the single layer graphene is an efficient fixing substance to capture the MDA-MB-231 human breast cancer cell, selectively. The immobilization method of the cancer cell on the graphene layer will be an effective cell counting system. Moreover usage of the linking with non-covalent bonding is expected to develope a sensor scheme of electrical cell-detecting diagnosis system.

  • PDF

Noncovalent Modification of Carbon Nanofibers Using 2-Naphthalenethiol for Catalyst Supports in PEM Fuel Cells

  • Oh, Hyung-Suk;Kim, Han-Sung
    • Journal of Electrochemical Science and Technology
    • /
    • v.1 no.2
    • /
    • pp.92-96
    • /
    • 2010
  • A new synthesis method for the preparation of Pt electrocatalysts on carbon nanofibers (CNFs) is reported. In this method, Pt electrocatalysts are loaded onto 2-naphthalenethiol (NT) functionalized CNFs. The noncovalent functionalization of CNFs by NT is the effective way for better distribution of Pt particles and higher electrocatalytic activity in polymer electrolyte membrane fuel cells. It was found that the presence of NT acts as a poison to catalysts. Therefore, it is necessary to remove NT through the heat treatment at $400^{\circ}C$.

Separation of Non-covalently Functionalized Graphene Nanoplatelets via Salting-out Process (염석법을 이용한 비공유 기능기화된 그래핀 나노플레이트렛의 분리 공정 연구)

  • Kim, Joonhui;Yoo, Sung Chan;Cha, Jaemin;Ryu, Hojin;Hong, Soon Hyung
    • Composites Research
    • /
    • v.32 no.3
    • /
    • pp.134-140
    • /
    • 2019
  • Graphene nanoplatelets (GNP), one of the graphene derivatives is famous as the most proper candidate for industrial applications. However, current performance of GNPs as reinforcing filler in composites is limited by their agglomeration and physicochemical heterogeneity. Herein, an approach to produce non-covalently functionalized GNPs (F-GNPs) is reported which possesses potential to be extended as the industrial level of mass production. The one-step functionalization process uses melamine, a low-cost chemical, to prevent agglomeration and dispersion in polar solvents. Furthermore, a purification strategy called salting-out process based on differences in the dispersibility of the individual F-GNP flakes is reported to separate F-GNPs. The functionalization and separation process developed in this paper provides a strategy to use GNPs at the industrial level in composite applications.