title: Formvar Assisted Graphene Transfer for Graphene TEM Grid.
abstract: We report a formvar assisted transfer method to make graphene TEM grids having single layer graphene. Our method uses formvar instead of PMMA as the polymer support and produces clean graphene. Formvar was easily removed by dissolving in chloroform and did not leave residues after removal because of the lower the molecular weight. Our transfer method achieved the higher average coverage (about 55%) than direct transfer method (about 5%). Since mesh grids were not exposed to a metal etchant solution during our transfer process, the mesh grid material for graphene transfer was not limited. Our graphene transfer method produces high quality and single layer graphene for a graphene TEM grid. Consequently, the formvar assisted graphene transfer method solves disadvantages of polymer support method and direct transfer.
authors.forename: Yong Bok
authors.initials: YB
authors.lastname: Lee
authors.forename: Heejun
authors.initials: H
authors.lastname: Jang
authors.forename: Chi Won
authors.initials: CW
authors.lastname: Ahn