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Arul, Narayanasamy Sabari,Yun, Dong Yeol,Lee, Dea Uk,Kim, Tae Whan RSC Pub 2013 Nanoscale Vol.5 No.23
<P>X-ray photoelectron spectra, X-ray diffraction patterns, scanning electron microscopy images, and high-resolution transmission electron microscopy images showed that the as-prepared samples were Cu2ZnSnS4 (CZTS) nanospheres with a kesterite phase. Ultraviolet-visible absorption spectra for the CZTS nanospheres with an average crystallite size of 3.26 nm showed that the absorption edge corresponding to the energy gap shifted to the higher energy side due to the quantum confinement within the CZTS nanoparticles. Current-density measurements showed that the power conversion efficiency (0.952%) of the organic photovoltaic cells with CZTS nanospheres was much higher than that (0.120%) of the cells without CZTS nanospheres.</P>
Structural, magnetic and electrochemical sensing behaviour of α-Fe<sub>2</sub>O<sub>3</sub> nanorods
김은주,( Narayanasamy Sabari Arul ),한정인 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
In this study, we adopt a co-precipitation method for the synthesis of one dimensional (1D) α-Fe<sub>2</sub>O<sub>3</sub> nanorods at room temperature. X-ray diffraction (XRD) and scanning electron microscopy (SEM) images confirms the presence of α-Fe<sub>2</sub>O<sub>3</sub> nanorods. Magnetic hysteresis measurement reveals that the α-Fe<sub>2</sub>O<sub>3</sub> nanorods displayed the ferromagnetic behavior with a remanence of 2.1 × 10<sup>-3</sup> emug<sup>-1</sup> and a coercivity of 45 Oe at room temperature. α-Fe<sub>2</sub>O<sub>3</sub> nanorods modified glassy carbon (GC) electrodes were characterized with cyclic voltammetric electrochemical techniques. A significant enhancement in cathodic peak current (C1), detection limit and sensitivity was observed for α-Fe<sub>2</sub>O<sub>3</sub> nanorods modified GC electrode with those of bare electrode.
Fabrication of conductive cotton yarn coated with reduced-graphene oxide by dip-coating method
김은주,( Narayanasamy Sabari Arul ),한정인 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
In this study, we fabricated the two types of conductive cotton yarns coated with reduced-graphene (RGO) and eosin Y/reduced-graphene (RGO) by dip-coating method. Also, we have investigated the electrical properties of the two types of conductive cotton yarns coated with reduced-graphene (RGO) and eosin Y/reduced-graphene (RGO). Scanning electron microscope (SEM) photos displayed the surface morphology of the conductive cotton yarns. It was observed that the maximum current for the conductive cotton yarn coated with RGO is 5times higher than those of conductive cotton yarn coated with eosin Y/RGO.