Two-Dimensional Water Diffusion at a Graphene-Silica Interface
arXiv:1404.6733 · doi:10.1021/ja4121988
Abstract
Because of the dominant role of the surface of molecules and their individuality, molecules behave dis-tinctively in a confined space, which has far-reaching implications in many physical, chemical and bio-logical systems. Here, we demonstrate that graphene forms a unique atom-thick interstitial space that enables the study of molecular diffusion in 2-dimensions with underlying silica substrates. Raman spec-troscopy visualized intercalation of water from the edge to the center underneath graphene in real time, which was dictated by the hydrophilicity of the substrates. In addition, graphene undergoes reversible deformation to conform to intercalating water clusters or islands. Atomic force microscopy confirmed that the interfacial water layer is only ca. 3.5 angstroms thick, corresponding to one bilayer unit of normal ice. This study also demonstrates that oxygen species responsible for the ubiquitous hole dop-ing are located below graphene. In addition to serving as a transparent confining wall, graphene and possibly other 2-dimensional materials can be used as an optical indicator sensitive to interfacial mass transport and charge transfer.
11 pages, 6 figures. J. Am. Chem. Soc. Article ASAP (2014)
References in corpus (20)
- Electric Field Effect in Atomically Thin Carbon Films
- Universal Dynamic Conductivity and Quantized Visible Opacity of Suspended Graphene
- Raman spectroscopy as a versatile tool for studying the properties of graphene
- The structure of suspended graphene sheets
- Impermeable Atomic Membranes from Graphene Sheets
- Measurement of the Optical Conductivity of Graphene
- Tuning the graphene work function by electric field effect
- The interlayer cohesive energy of graphite from thermal desorption of polyaromatic hydrocarbons
- Optical Separation of Mechanical Strain from Charge Doping in Graphene
- Graphene Oxidation: Thickness Dependent Etching and Strong Chemical Doping
- Raman Fingerprint of Charged Impurities in Graphene
- Atmospheric Oxygen Binding and Hole Doping in Deformed Graphene on a SiO2 Substrate
- Intrinsic and extrinsic corrugation of monolayer graphene deposited on SiO2
- Effect of pressure on the phase behavior and structure of water confined between nanoscale hydrophobic and hydrophilic plates
- Phonon renormalisation in doped bilayer graphene
- Water-Gated Charge Doping of Graphene Induced by Mica Substrates
- Raman Spectroscopy of Lithographically Patterned Graphene Nanoribbons
- High-fidelity conformation of graphene to SiO2 topographic features
- Scanning Tunneling Microscopy Study and Nanomanipulation of Graphene-Coated Water on Mica
- Bistability and oscillatory motion of natural nano-membranes appearing within monolayer graphene on silicon dioxide
Cited by in corpus (11)
- Structural and optical properties of single- and few-layer magnetic semiconductor CrPS4
- On-Stack Two-Dimensional Conversion of MoS2 into MoO3
- Interface-Confined Doubly Anisotropic Oxidation of Two-Dimensional MoS2
- Anomalous Freezing of Low Dimensional Water Confined in Graphene Nanowrinkles
- Impacts of dielectric screening on the luminescence of monolayer WSe
- Varying Electronic Coupling at Graphene-Copper Interfaces Probed with Raman Spectroscopy
- Investigating Material Interface Diffusion Phenomena through Graph Neural Networks in Applied Materials
- Direction-Controlled Chemical Doping for Reversible G-Phonon Mixing in ABC Trilayer Graphene
- Reversible Sulfuric Acid Doping of Graphene Probed by in-situ Multi-Wavelength Raman Spectroscopy
- Optically Facet-Resolved Reaction Anisotropy in Two-Dimensional Transition Metal Dichalcogenides
- Water structuring at stacked graphene interfaces unveiled by machine-learning molecular dynamics