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| Graphene oxide | |
|---|---|
| Name | Graphene oxide |
| Formula | CxHyOz |
| Appearance | Brown to yellow powder or colloidal suspension |
| Discovered | 1859 |
| Discoverer | Benjamin Brodie |
Graphene oxide is a chemically modified form of layered carbon derived from graphite exhibiting oxygen-containing functional groups that alter electronic, mechanical, and chemical behavior. It bridges historical studies in Organic chemistry and modern advances in Nanotechnology and Materials science, enabling integration into research at institutions such as Massachusetts Institute of Technology, University of Cambridge, and Max Planck Society. Developed through routes connected to the work of Benjamin Brodie, H. C. Oersted-era investigations, and modern refinements at laboratories like Columbia University and Harvard University, graphene oxide underpins applications across sectors exemplified by collaborations with NASA, Siemens, and Samsung.
Graphene oxide emerged from 19th-century oxidation of Graphite and found renewed interest following breakthroughs in Graphene isolation and characterization at University of Manchester and IBM Research. Its layered morphology and tunable chemistry have been explored in contexts linked to projects at DARPA, European Space Agency, and corporate research centers such as Bell Labs and IBM Watson Research Center. Researchers at Stanford University, Tsinghua University, and ETH Zurich have applied graphene oxide in studies that intersect with work on Lithium-ion battery development, Flexible electronics, and Desalination research led by national labs like Argonne National Laboratory.
The basal planes of graphene oxide retain a hexagonal lattice related to Graphene while bearing epoxy, hydroxyl, carbonyl, and carboxyl groups analogous to functionalities studied in Benzenes and Polycyclic aromatic hydrocarbons. Its electronic structure differs from pristine graphene in ways relevant to investigations by Nobel Prize in Physics laureates and institutions such as Royal Society-affiliated groups. Mechanical properties measured in studies at California Institute of Technology and Imperial College London show altered Young’s modulus and fracture behavior similar to findings in Carbon nanotube research. Optical absorption, thermal conductivity, and surface energy are influenced by oxidation level, paralleling measurement campaigns at National Institute of Standards and Technology and Riken.
Common synthesis routes trace lineage to classical oxidation methods and modern modifications developed at Columbia University and by industrial partners like BASF and Dow Chemical Company. Protocols such as versions of the Hummers method, linked historically to chemistry advances recognized by American Chemical Society, are performed in labs at University of California, Berkeley, Peking University, and Kyoto University. Scale-up for commercial supply chains involves collaborations between firms including 3M and Honeywell and follows manufacturing practices adopted by Toyota for materials integration. Environmental and safety procedures align with standards from Occupational Safety and Health Administration and European Chemicals Agency.
Characterization employs spectroscopic and microscopic tools developed and standardized by organizations like IEEE, American Society for Testing and Materials, and laboratories such as Los Alamos National Laboratory. Techniques include X-ray photoelectron spectroscopy (XPS) with instrumentation from Thermo Fisher Scientific, Raman spectroscopy as used in Nobel Prize in Physics-related graphene studies, transmission electron microscopy (TEM) practiced at Brookhaven National Laboratory, atomic force microscopy (AFM) methods refined at IBM Research, and X-ray diffraction (XRD) protocols found in facilities at CERN and European Synchrotron Radiation Facility. Thermal analysis and elemental mapping are performed in research centers including Argonne National Laboratory and Sandia National Laboratories.
Chemical reduction to form reduced graphene oxide (rGO) employs reducing agents and catalytic strategies developed in chemical research traditions linked to Dow Chemical Company, Dupont, and university groups at Massachusetts Institute of Technology and University of Tokyo. Derivatization strategies produce graphene oxide composites with polymers studied at MIT Media Lab, inorganic nanostructures explored at Lawrence Berkeley National Laboratory, and metal-organic frameworks investigated at University of California, Los Angeles. Functionalized derivatives have been engineered for energy storage in projects with Tesla, Inc., for sensing in collaborations with Siemens Healthineers, and for catalysis in efforts tied to Shell plc research programs.
Graphene oxide is investigated for membrane technologies in desalination projects associated with Suez, for electrodes in battery research influenced by breakthroughs at Panasonic and LG Chem, and for conductive inks in flexible electronics researched by Sony and Samsung Electronics. Biomedical exploration at Johns Hopkins University and Mayo Clinic addresses drug delivery, biosensing, and tissue scaffolds, while collaborations with Pfizer and Roche probe diagnostic uses. Environmental remediation studies at University of California, Davis and University of Queensland evaluate adsorption of pollutants alongside pilot programs by United Nations Environment Programme and World Health Organization initiatives.
Toxicology assessments draw on frameworks from World Health Organization, Environmental Protection Agency, and academic toxicology groups at University College London and Harvard T.H. Chan School of Public Health. Studies examine cellular interactions paralleling nanoparticle research from National Institutes of Health and discuss environmental fate in modeling efforts by Intergovernmental Panel on Climate Change-informed teams. Regulatory discourse involves stakeholders such as European Chemicals Agency and national agencies including Food and Drug Administration when medical translation is pursued.