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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Fei Liu Tae Seok Seo |
| Copyright Year | 2010 |
| Description | Author affiliation: Department of Chemical and Biomolecular Engineering and Institute for BioCentury, KAIST, 335 Gwahangno, Yuseong-gu, Daejeon 305-701, South Korea (Fei Liu; Tae Seok Seo) |
| Abstract | He re we present a simple method to prepare large-scale graphene sponges and free-standing graphene films using a speed vacuum concentrator. During a centrifugal evaporation process, suspended graphene oxide (GO) sheets in an aqueous solution have been assembled to generate network-linked GO sponges or a series of multilayer GO films depending on the temperature of a centrifugal vacuum chamber. While sponge-like bulk GO materials (GO sponges) have been produced at 40 °C, uniform free-standing GO films which size were up to 9 $cm^{2}$ were generated at 80 °C. The thickness of GO films can be controlled from 200 nm to 1 µm based on the concentration of the GO colloidal suspension and evaporation temperature. The synthesized GO films exhibit high flexibility with a smooth surface and condensed density. Reduced GO sponges and films have been produced through a thermal annealing process at 800°C with H/Ar flow. Scanning electron microscope (SEM), High resolution transmission electron microscope (HRTEM) and x-ray photoelectron spectroscope (XPS) were employed to charaterize the reduced GO sponges and films. |
| Starting Page | 696 |
| Ending Page | 699 |
| File Size | 385870 |
| Page Count | 4 |
| File Format | |
| ISBN | 9781424470334 |
| ISSN | 19449380 |
| e-ISBN | 9781424470327 |
| e-ISBN | 9781424470310 |
| DOI | 10.1109/NANO.2010.5697936 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2010-08-17 |
| Publisher Place | Korea (South) |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Content Type | Text |
| Resource Type | Article |
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