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Hossain, Muhammad Mohsin,Park, Ok-Kyung,Hahn, Jae Ryang,Ku, Bon-Cheol Elsevier 2014 Materials letters Vol.123 No.-
We developed an efficient method for exfoliating pristine graphite in an organic solvent to produce a high yield (14%) and high concentration (5.25 mg/mL) of well-dispersed mono-, bi-, and multi-layered graphene sheets. Pre-thermal activation of pristine graphite at 900 degrees C in a sealed stainless steel bath under high pressure, followed by sonication in a solvent of 1-methyl-2-pyrrolidinone at elevated temperatures produced a solution of homogeneous, well-dispersed, defect-free, and non-oxidized graphene. The resulting electrical conductivities of the graphene sheets were high, up to 849 S/cm. (c) 2014 Elsevier B.V. All rights reserved.
Muhammad Mohsin Hossain,한재량,구본철 대한화학회 2014 Bulletin of the Korean Chemical Society Vol.35 No.7
A simple method for exfoliating pristine graphite to yield mono-, bi-, and multi-layers of graphene sheets as a highly concentrated (5.25 mg/mL) and yielded solution in an organic solvent was developed. Pre-thermal treatment of pristine graphite at 900 °C in a sealed stainless steel bath under high pressures, followed by sonication in 1-methyl-2-pyrrolidinone solvent at elevated temperatures, produced a homogeneous, welldispersed, and non-oxidized graphene solution with a low defect density. The electrical conductivities of the graphene sheets were very high, up to 848 S/cm. These graphene sheets were used to fabricate graphenepolyimide nanocomposites, which displayed a higher electrical conductivity (1.37 S/m) with an improved tensile strength (95 MPa). The synthesized graphene sheets and nanocomposites were characterized by transmission electron microscopy, scanning electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy, and Raman spectroscopy.
Hossain, Muhammad Mohsin,Shima, Hossain,Islam, Md. Akherul,Hasan, Mudassir,Lee, Moonyong American Chemical Society 2016 The Journal of Physical Chemistry Part C Vol.120 No.31
<P>Semiconducting ZnO was used as a surface enhanced Raman scattering (SERS) substrate without needing to combine it with novel metal particles. An interesting synergistic effect in the Raman scattering of ZnO nanoparticles and CNTs was observed due to the vibrational force of Zn and O atoms in the Zn-O system of ZnO nanoparticles and the special deformation of CNTs in the SERS fiber. The convenient deformation of CNTs allowed a large number of carbon atoms in the planar direction, such as a graphene sheet, and facilitated the planar vibrations of sp(2) carbon atoms, leading to a considerable increase in the G and 2D band intensity. A new radial breathing mode (RBM) peak was activated by the radial polarization of CNTs through the vibration force of Zn and O atoms in the Zn-O system in its radial direction. The cross-section cutting 3D image of the SERS fiber revealed the CNTs to be rearranged geometrically in the SERS fiber and formed a bunched structure because of the enhanced interactions among the individual CNTs via ZnO nanoparticles. This highlights a new dimension of research into ZnO nanomaterials and CNTs in SERS fibers and provides new insights into ZnO-CNT fiber composites.</P>
Hossain, Muhammad Mohsin,Hahn, Jae Ryang,Ku, Bon-Cheol Korean Chemical Society 2014 Bulletin of the Korean Chemical Society Vol.35 No.7
A simple method for exfoliating pristine graphite to yield mono-, bi-, and multi-layers of graphene sheets as a highly concentrated (5.25 mg/mL) and yielded solution in an organic solvent was developed. Pre-thermal treatment of pristine graphite at $900^{\circ}C$ in a sealed stainless steel bath under high pressures, followed by sonication in 1-methyl-2-pyrrolidinone solvent at elevated temperatures, produced a homogeneous, well-dispersed, and non-oxidized graphene solution with a low defect density. The electrical conductivities of the graphene sheets were very high, up to 848 S/cm. These graphene sheets were used to fabricate graphene-polyimide nanocomposites, which displayed a higher electrical conductivity (1.37 S/m) with an improved tensile strength (95 MPa). The synthesized graphene sheets and nanocomposites were characterized by transmission electron microscopy, scanning electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy, and Raman spectroscopy.
Hossain, Muhammad Mohsin,Islam, Md. Akherul,Shima, Hossain,Hasan, Mudassir,Lee, Moonyong American Chemical Society 2017 ACS APPLIED MATERIALS & INTERFACES Vol.9 No.6
<P>This is the first study that describes how semiconducting ZnO can act as an alignment agent in carbon nanotubes (CNTs) fibers. Because of the alignment of CNTs through the ZnO nanoparticles linking groups, the CNTs inside the fibers were equally distributed by the attraction of bonding forces into sheetlike bunches, such that any applied mechanical breaking load was equally distributed to each CNT inside the fiber, making them mechanically robust against breaking loads. Although semiconductive ZnO nanoparticles were used here, the electrical conductivity of the aligned CNT fiber was comparable to bare CNT fibers, suggesting that the total electron movement through the CNTs inside the aligned CNT fiber is not disrupted by the insulating behavior of ZnO nanoparticles. A high degree of control over the electrical conductivity was also demonstrated by the ZnO nanoparticles, working as electron movement bridges between CNTs in the longitudinal and crosswise directions. Well-organized surface interface chemistry was also observed, which supports the notion of CNT alignment inside the fibers. This research represents a new area of surface interface chemistry for interfacially linked CNTs and ZnO nanomaterials with improved mechanical properties and electrical conductivity within aligned CNT fibers.</P>
Hossain Shima,Muhammad Mohsin Hossain,한재량 대한화학회 2015 Bulletin of the Korean Chemical Society Vol.36 No.9
An efficient one-step thermolysis method is developed to fabricate an optically active and well-ordered array of zinc oxide (ZnO)@C core@shell hexagonal (ZCCSH) nanorods. These nanorods containing oxygen vacancy defects are synthesized using zinc acetate dihydrate under sealed conditions by a thermolysis reaction, and exhibit strong light absorption throughout the visible region and in most of the near-IR region. ZCCSH nanorods are converted to carbon nanotubes (CNTs) by a simple acid treatment with a high dispersion concentration (1.83 mg/mL) in an organic solvent. The CNTs exhibit good electrical conductivity (6100 S/m). The morphology, structure, and interface characteristics of ZCCSH and CNTs are investigated.
Hasan, Mudassir,Hossain, Muhammad Mohsin,Lee, Moonyong Elsevier 2015 Journal of industrial and engineering chemistry Vol.32 No.-
<P><B>Abstract</B></P> <P>This paper reports the synthesis of camphor sulfonic acid (CSA) doped PANI/GN composite nanofibers by the <I>in situ</I> chemical oxidative polymerization of aniline in the presence of cationic surfactant cetyl tri methyl ammonium bromide (CTAB). The as-synthesized composite nanofibers were examined by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Raman spectroscopy, UV–vis diffused reflectance spectroscopy, and thermogravimetric analysis. The CSA-doped PANI/GN composite nanofibers showed higher DC electrical conductivity than PANI, which was attributed to the enhanced mobility of the charge carriers after the incorporation of GN into the PANI/GN composite nanofibers. The PANI/GN composite nanofibers also showed improved DC electrical conductivity retention at 413K, which might be due to the synergistic effects of GN and PANI in the composite structure.</P> <P><B>Highlights</B></P> <P> <UL> <LI> CSA doped PANI/GN composite nanofibers has been prepared under CTAB. </LI> <LI> Electrical conductivity retention was found to be more in case of PANI/GN compared to PANI. </LI> <LI> Conductivity was improved in case of PANI/GN composite nanofibers. </LI> </UL> </P>
Mudassir Hasan,Muhammad Mohsin Hossain,이문용 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.32 No.-
This paper reports the synthesis of camphor sulfonic acid (CSA) doped PANI/GN composite nanofibers bythe in situ chemical oxidative polymerization of aniline in the presence of cationic surfactant cetyl trimethyl ammonium bromide (CTAB). The as-synthesized composite nanofibers were examined by scanningelectron microscopy, transmission electron microscopy, X-ray diffraction, Raman spectroscopy, UV–visdiffused reflectance spectroscopy, and thermogravimetric analysis. The CSA-doped PANI/GN compositenanofibers showed higher DC electrical conductivity than PANI, which was attributed to the enhancedmobility of the charge carriers after the incorporation of GN into the PANI/GN composite nanofibers. ThePANI/GN composite nanofibers also showed improved DC electrical conductivity retention at 413 K, whichmight be due to the synergistic effects of GN and PANI in the composite structure.