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Overcoming throughput challenges in current graphene defect healing processes, such as conventional thermal annealing, is crucial for realizing post‐silicon device fabrication. Herein, a new time‐ and energy‐efficient method for defect healing in graphene is reported, utilizing polymer‐assisted rapid thermal annealing (RTA). In this method, a nitrogen‐rich, polymeric “nanobandage” is coated directly...
Electronic DNA‐biosensor with a single nucleotide resolution capability is highly desirable for personalized medicine. However, existing DNA‐biosensors, especially single nucleotide polymorphism (SNP) detection systems, have poor sensitivity and specificity and lack real‐time wireless data transmission. DNA‐tweezers with graphene field effect transistor (FET) are used for SNP detection and data are...
Advances in techniques for monitoring pH in complex fluids can have a significant impact on analytical and biomedical applications. This study develops flexible graphene microelectrodes (GEs) for rapid (<5 s), very‐low‐power (femtowatt) detection of the pH of complex biofluids by measuring real‐time Faradaic charge transfer between the GE and a solution at zero electrical bias. For an idealized...
Liquid-based applications of biomolecule-decorated field-effect transistors (FETs) range from biosensors to in vivo implants. A critical scientific challenge is to develop a quantitative understanding of the gating effect of charged biomolecules in ionic solution and how this influences the readout of the FETs. To address this issue, we fabricated protein-decorated graphene FETs and measured their...
This paper demonstrates laser scanning microscopy (LSM) as a viable means for quantitative and accurate measurement of reflectivity of microscopic objects/samples with diffraction-limited spatial resolution. As an example, the LSM technique along with the quantized nature of reflectivity in graphene are utilized to identify and count the number of layers of graphene few-layer flakes based on their...
The field electron emission from extending states through a localized energy level in a phenomenological way has been discussed. The method of non-equilibrium Green function is adopted. The physical origin of the enhancement of field-emission can be understood from the potential-energy diagram. For the higher temperature, the localized level can be occupied in weaker field. Correspondingly, the transition...
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