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Inverse Stone-Thrower-Wales defect and transport properties of 9AGNR double-gate graphene nanoribbon FETs

Journal of Central South University 2019年第11期26卷 2943-2952页

作者： Mohammad Bagher NASROLLAHNEJAD parviz keshavarzi Electrical and Computer Engineering Department Semnan University

Defect-based engineering of carbon nanostructures is becoming an important and powerful method to modify the electron transport properties in graphene nanoribbon FETs. In this paper, the impact of the position and symmetry of the ISTW defect on the performance of low dimensional 9AGNR double-gate graphene nanoribbon FET (DG-GNRFET) is investigated. Analyzing the transmission spectra, density of states and current-voltage characteristics shows that the defect effect on the electron transport is considerably varied depending on the positions and the orientations (the symmetric and asymmetric configuration) of the ISTW defect in the channel length. Based on the results, the asymmetric ISTW defect leads to a more controllability of the gate voltages over drain current, and drain current increases more than 5 times. The results have also con rmed the ISTW defect engineering potential on controlling the channel electrical current of DG-AGNR FET.

关键词： inverse Stone-Thrower-Wales defect electronic transport properties graphene nanoribbon tight binding NEGF formalism

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Radiolabeled FMLF a Valuable Peptide for Diagnostic Imaging

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Journal of Pharmacy and Pharmacology 2014年第1期2卷 70-78页

作者： Fatemeh keshavarzi parviz Ashtari Department of Biology Sanandaj Branch Islamic Azad University Sanandaj Kurdistan 66169-35391 lran Radiation Application Research School Nuclear Science & Technology Research Institute Tehran 14399-51113 Iran

Molecular imaging techniques are increasingly being used in the localization of disease, the staging of disease and for therapy control. The objective of current study focused on the optimization of synthesis, quality control, in vitro and in vivo evaluation of 123I radiopharmaceuticals based on the chemotactic peptide N-formyl-Met-Leu-Phe. Labeling studies were done both by direct method using chloramine-Y according to Khawli （1989） and indirect method using [125I and 131I] S1B according to Zalutsky （1987）. Then, biodistribution studies were performed both in normal mice and the one bearing 50 laL turpentine for 24h, promoted inflammation in right leg. Furthermore, the ability of the labeled peptide conjugate to bind to human polymorph nuclear leukocytes was determined using in vitro assay. With increasing in pl-l, yield of labeled FMLF （N-formyl-Met-Leu-Phe） decreased perhaps because of interaction OH to carboxyl group of SIB. The maximum activity was observed in the right leg which injected with turpentine due to infection and increase in blood circulation. Also, this peptide was conjugated to PMN （Poly morph nuclear） specifically and maximum activity was 66%. The highest absorption of FLMF was seen in kidney, liver, stomach and gut. The small size of this protein causes passing through the glomerular of kidney, so high activity was observed in urine and bladder.

关键词： Molecular imaging FLMF radiolabeled peptide.

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