Abstract
Graphite oxide (GiO) and graphene oxide (GeO) possess wide applicability in technological devices. The exact chemical compositions, structures, and properties of these materials remain vague to the graphene community despite being heavily researched. As metastable materials, the properties of GiO and GeO are easily manipulated under various conditions of temperature, light, and atmosphere. Although these aspects are important considerations for long-term storage of the materials, they are not well understood. In this experimental work, investigations are performed to determine how light and atmosphere contribute to the characteristics of GiO and GeO powders. The study shows that, at room-temperature, the quasi-equilibrium states of both materials, in specific the O/C ratios, vary according to the storage conditions. Drastic disparities between GiO and GeO are observed. GiO kept away from light and GeO kept under inert atmosphere maintain relatively high O/C ratios. As the metastable states of the materials are governed by the diffusion of oxygen functionalities, the presence of epoxide groups diminishes while negligible changes occur to the sp2 lattice size. This experimental work lays out fundamental aspects that govern the stability of frequently mass-produced GiO and GeO powders under different environments, with major implications on their optimal storage conditions.
| Original language | English |
|---|---|
| Pages (from-to) | 1266-1272 |
| Number of pages | 7 |
| Journal | Small |
| Volume | 11 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2015 Mar 18 |
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All Science Journal Classification (ASJC) codes
- Biotechnology
- Biomaterials
- Chemistry(all)
- Materials Science(all)
- Engineering (miscellaneous)
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Light and Atmosphere Affect the Quasi-equilibrium States of Graphite Oxide and Graphene Oxide Powders. / Chua, Chun Kiang; Pumera, Martin.
In: Small, Vol. 11, No. 11, 18.03.2015, p. 1266-1272.Research output: Contribution to journal › Article
TY - JOUR
T1 - Light and Atmosphere Affect the Quasi-equilibrium States of Graphite Oxide and Graphene Oxide Powders
AU - Chua, Chun Kiang
AU - Pumera, Martin
PY - 2015/3/18
Y1 - 2015/3/18
N2 - Graphite oxide (GiO) and graphene oxide (GeO) possess wide applicability in technological devices. The exact chemical compositions, structures, and properties of these materials remain vague to the graphene community despite being heavily researched. As metastable materials, the properties of GiO and GeO are easily manipulated under various conditions of temperature, light, and atmosphere. Although these aspects are important considerations for long-term storage of the materials, they are not well understood. In this experimental work, investigations are performed to determine how light and atmosphere contribute to the characteristics of GiO and GeO powders. The study shows that, at room-temperature, the quasi-equilibrium states of both materials, in specific the O/C ratios, vary according to the storage conditions. Drastic disparities between GiO and GeO are observed. GiO kept away from light and GeO kept under inert atmosphere maintain relatively high O/C ratios. As the metastable states of the materials are governed by the diffusion of oxygen functionalities, the presence of epoxide groups diminishes while negligible changes occur to the sp2 lattice size. This experimental work lays out fundamental aspects that govern the stability of frequently mass-produced GiO and GeO powders under different environments, with major implications on their optimal storage conditions.
AB - Graphite oxide (GiO) and graphene oxide (GeO) possess wide applicability in technological devices. The exact chemical compositions, structures, and properties of these materials remain vague to the graphene community despite being heavily researched. As metastable materials, the properties of GiO and GeO are easily manipulated under various conditions of temperature, light, and atmosphere. Although these aspects are important considerations for long-term storage of the materials, they are not well understood. In this experimental work, investigations are performed to determine how light and atmosphere contribute to the characteristics of GiO and GeO powders. The study shows that, at room-temperature, the quasi-equilibrium states of both materials, in specific the O/C ratios, vary according to the storage conditions. Drastic disparities between GiO and GeO are observed. GiO kept away from light and GeO kept under inert atmosphere maintain relatively high O/C ratios. As the metastable states of the materials are governed by the diffusion of oxygen functionalities, the presence of epoxide groups diminishes while negligible changes occur to the sp2 lattice size. This experimental work lays out fundamental aspects that govern the stability of frequently mass-produced GiO and GeO powders under different environments, with major implications on their optimal storage conditions.
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U2 - 10.1002/smll.201400154
DO - 10.1002/smll.201400154
M3 - Article
VL - 11
SP - 1266
EP - 1272
JO - Small
JF - Small
SN - 1613-6810
IS - 11
ER -