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| N-doped graphene | |
|---|---|
| Name | N-doped graphene |
| Formula | C_xN_y |
| Appearance | black or dark gray sheet |
| Uses | catalysis, sensors, energy storage, electronics |
N-doped graphene N-doped graphene is a class of chemically modified Graphene in which some carbon atoms in a two-dimensional lattice are replaced by nitrogen atoms, producing altered electronic, chemical, and mechanical properties. It is studied across research associated with Massachusetts Institute of Technology, Stanford University, University of Cambridge, University of Oxford, Harvard University and industrial laboratories such as IBM Research, Samsung Electronics, Toyota Central R&D Laboratories and Siemens for applications spanning catalysis, sensing, energy storage and nanoelectronics. Work on N-doped graphene intersects major initiatives and funding agencies including the National Science Foundation, European Research Council, Japan Society for the Promotion of Science and consortia like the Graphene Flagship.
N-doped graphene emerged from foundational research on Graphene and heteroatom substitution studied at institutions like University of Manchester, Columbia University, ETH Zurich, Tsinghua University and Peking University. Early influential papers appeared alongside developments at Nobel Prize–associated centers and laboratories linked to laureates such as Andre Geim and Konstantin Novoselov though the material is distinct from pristine graphene. Interest increased through cross-disciplinary collaborations involving National Institutes of Health, European Commission, DARPA programs, and industrial partnerships including BASF, Dow Chemical Company and Boeing.
Synthetic routes include chemical vapor deposition (CVD) developed at facilities like IBM and Intel research labs, thermal annealing protocols used in studies at Oak Ridge National Laboratory and Lawrence Berkeley National Laboratory, plasma treatments trialed at Sandia National Laboratories, and wet-chemical functionalization performed in groups at Caltech and Scripps Research Institute. Typical precursors include ammonia, pyridine, melamine, and nitrogen-containing polymers adapted from methodologies in publications associated with Nature, Science, Physical Review Letters and Advanced Materials. Controlled doping strategies leverage substrates such as copper foils studied by teams at Brookhaven National Laboratory and Argonne National Laboratory and use post-synthesis treatments inspired by procedures at Max Planck Society centers and Riken laboratories. Scale-up efforts draw on manufacturing expertise from General Electric, Sony, LG Electronics and pilot plants influenced by standards set at International Organization for Standardization workshops.
N-doped graphene exhibits configurations including pyridinic, pyrrolic, graphitic (quaternary) and oxidized nitrogen sites identified in studies at University of California, Berkeley, University of Illinois Urbana-Champaign and Yale University. Substitution alters band structure examined within frameworks from Condensed Matter Physics groups at Princeton University and University of Tokyo, producing n-type behavior reported by researchers at Cornell University and University of Pennsylvania. Electronic transport, work function shifts and spin properties have been probed in experiments tied to Bell Labs traditions and modern spintronics centers such as NEC Corporation and Hitachi. Structural motifs are compared to other two-dimensional materials investigated at Korea Advanced Institute of Science and Technology and National University of Singapore.
Characterization uses techniques like X-ray photoelectron spectroscopy (XPS) refined at SLAC National Accelerator Laboratory and DESY, Raman spectroscopy practiced in groups linked to Royal Society–funded labs, scanning tunneling microscopy (STM) derived from IBM and University of Basel innovations, and transmission electron microscopy (TEM) employing instruments at Max Planck Institute for Solid State Research and European Synchrotron Radiation Facility. Electrical measurements utilize setups from Intel and NVIDIA collaborations, while surface analysis and chemical mapping are performed at facilities associated with Lawrence Livermore National Laboratory and Fermilab. Standard protocols align with recommendations from American Society for Testing and Materials and interlaboratory studies coordinated by National Physical Laboratory.
N-doped graphene is explored as an electrocatalyst for oxygen reduction reaction (ORR) in fuel cell research at Toyota, General Motors, Shell and TotalEnergies, as an anode/cathode material for lithium-ion and sodium-ion batteries developed by Panasonic, Tesla, LG Chem and Samsung SDI, and as a material for supercapacitors investigated at Siemens Energy and ABB. Sensor applications tie into biomedical device programs at Mayo Clinic, Johns Hopkins University and Cleveland Clinic; environmental remediation efforts involve collaborations with UN Environment Programme initiatives. Electronic and photonic uses are pursued in projects at Microsoft Research, Google and Sony Corporation spin-off labs, as well as in flexible electronics work at Nokia and HTC.
Stability under thermal, chemical and electrochemical conditions is assessed in studies funded by US Department of Energy, European Research Council grants and national labs including Pacific Northwest National Laboratory. Reactivity toward oxygen, acids and bases is evaluated following safety frameworks from Occupational Safety and Health Administration, European Chemicals Agency and World Health Organization guidelines. Toxicity studies referencing protocols used in toxicology centers at National Institutes of Health, Imperial College London and Karolinska Institute address cytotoxicity, inhalation risk and environmental persistence, informing regulatory discussions with agencies like Environmental Protection Agency and Health Canada.
Theoretical investigations employ density functional theory (DFT) models developed in computational centers at Argonne National Laboratory, Oak Ridge National Laboratory, Lawrence Livermore National Laboratory, Los Alamos National Laboratory and university groups at Massachusetts Institute of Technology, Stanford University and California Institute of Technology. Multiscale modeling integrates inputs from supercomputing facilities such as Oak Ridge Leadership Computing Facility and National Energy Research Scientific Computing Center and collaborations with consortia including PRACE and XSEDE. Modeling addresses electronic structure, defect energetics, catalytic active sites, and transport properties with methods advanced in journals like Physical Review B, Journal of the American Chemical Society and Nano Letters.