Perspectives on the 2010 Nobel Prize in Physics for Graphene
ABSTRACT The 2010 Nobel Prize in physics was awarded to Andre Geim and Konstantin Novoselov for their groundbreaking experiments regarding the two-dimensional material graphene. Some personal perspectives about this award are presented.
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ABSTRACT: Graphene has attracted intense research interest due to its exotic properties and potential applications. Chemical vapor deposition (CVD) on Cu foils has shown great promises for macroscopic growth of high-quality graphene. By delicate design and control of the CVD conditions, here we demonstrate that a nonequilibrium steady state can be achieved in the gas phase along the CVD tube, that is, the active species from methane cracking increase in quantity, which results in a thickness increase continually for graphene grown independently at different positions downstream. In contrast, uniform monolayer graphene is achieved everywhere if Cu foils are distributed simultaneously with equal distance in the tube, which is attributed to the tremendous density shrink of the active species in the gas phase due to the sink effect of the Cu substrates. Our results suggest that the gas-phase reactions and dynamics are critical for the CVD growth of graphene and further demonstrate that the graphene thickness from the CVD growth can be fine-tuned by controlling the gas-phase dynamics. A similar strategy is expected to be feasible to control the growth of other nanostructures from gas phases as well.The Journal of Physical Chemistry C 05/2012; 116(19):10557–10562. DOI:10.1021/jp210814j · 4.84 Impact Factor
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ABSTRACT: This review summarises the most recent contributions in the fabrication of graphene-based electrochemical biosensors in recent years. It discusses the synthesis and application of graphene to the fabrication of graphene-based electrochemical sensors, its analytical performance and future prospects. An increasing number of reviews and publications involving graphene sensors have been reported ever since the first design of graphene electrochemical biosensor. The large surface area and good electrical conductivity of graphene allow it to act as an "electron wire" between the redox centres of an enzyme or protein and an electrode׳s surface, which make it a very excellent material for the design of electrochemical biosensors. Graphene promotes the different rapid electron transfers that facilitate accurate and selective detection of cytochrome-c, β-nicotinamide adenine dinucleotide, haemoglobin, biomolecules such as glucose, cholesterol, ascorbic acid, uric acid, dopamine and hydrogen peroxide.Talanta 01/2015; 131C:424-443. DOI:10.1016/j.talanta.2014.07.019 · 3.51 Impact Factor
Article: Charged-Molecule Physics[Show abstract] [Hide abstract]
ABSTRACT: Commonly, chemical modification is considered to be the ultimate way to tune properties of graphene for new devices. The work of Riss and colleagues reported in this issue of ACS Nano demonstrates a reverse approach that enables tuning of molecular properties with graphene. When a back-gate voltage is used, the Dirac point of graphene is shifted with respect to the electronic states of the molecules. This extra electric field opens fascinating new routes toward ultimate sensitive sensors or experimental devices for studying new molecular physics.ACS Nano 06/2014; 8(6). DOI:10.1021/nn5030219 · 12.03 Impact Factor