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CVD growth of graphene/h-BN layers, structural characterization and study of layers: water interaction

Grant number: 13/21190-2
Support type:Scholarships abroad - Research
Effective date (Start): February 28, 2014
Effective date (End): February 27, 2015
Field of knowledge:Physical Sciences and Mathematics - Physics
Principal Investigator:Juan Alfredo Guevara Carrió
Grantee:Juan Alfredo Guevara Carrió
Host: Antonio Helio de Castro Neto
Home Institution: Escola de Engenharia (EE). Universidade Presbiteriana Mackenzie (UPM). Instituto Presbiteriano Mackenzie. São Paulo, SP, Brazil
Local de pesquisa : National University of Singapore (NUS), Singapore  
Associated research grant:12/50259-8 - Graphene: photonics and opto-electronics: UPM-NUS collaboration, AP.SPEC

Abstract

Recently, graphene's interaction with water, ionic solutions and gases came into sharp focus. It was been argued that water could flow anomalously fast over graphitic surfaces, and that flow of aqueous ions and gases through defects in graphene and graphene oxide membranes have very high selectivity. This led to graphene application research in water desalinization, single-molecule DNA sequening, gas separation, etc. Related aspect of hydrophobic property of graphene, and "wetting transparency" of graphene, are sharply debated in the current literature. We aim to systematically investigate graphene-water interaction using contact-angle measurements, atomic force microscopy (AFM), Raman, optical and FTIR measurements. We will compare graphene's properties to those of similarly structured 2D materials graphene-oxide, and hexagonal boron-nitride (BN). The modulation of the wetting and wetting transparency will be investigated in the case of graphene/BN heterostructures. At NUS Graphene Research Centre, we will join the Nano/Bio Group who has extensive expertise in those measurements and pioneered investigation of ion and DNA transport though nanopores in graphene membranes. The combined knowledge will be applied in the investigation of the single-molecule biosensing and water filtering. The first step of the project will be the development and implementation of the fabrication methods for large area BN films, as well as graphene-BN films with pristine interface between the two layers. Immediate application of this work will be in the design of nanopore-sensors for single-molecule characterization and DNA sequencing. (AU)

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
HONG, SEUNGHYUN; CONSTANS, CHARLOTTE; MARTINS, MARCOS VINICIUS SURMANI; SEOW, YONG CHIN; GUEVARA CARRIO, JUAN ALFREDO; GARAJ, SLAVEN. Scalable Graphene-Based Membranes for Ionic Sieving with Ultrahigh Charge Selectivity. Nano Letters, v. 17, n. 2, p. 728-732, FEB 2017. Web of Science Citations: 27.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.
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