A novel synthesis route and phase transformation of Zno nanoparticles modified by DDAB

Liang, Ji Yun; Guo, Lin; Xu, Huibin; Liu, Jing; Dong, Li Xiao; Hua, Wu Zhong; Yu, Wu; Weber, J. M.

doi:10.1016/s0022-0248(02)02522-8

Cited by 19 publications

(6 citation statements)

References 22 publications

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“…It can be seen clearly that both the volume change and the transition pressure of ZnO nanowires are lower than that of the bulk and decrease as the diameter of the nanowires decreases. Comparing the experimental transition pressure of 13∼14 and 10.5 GPa for wz-nw1 wz-nw2 wz-nw3 nanocrystalline [14,18], 8.0 GPa for nanorods [16], 11.0 GPa for nanotube [17], and the theoretical results of 8.2 GPa for nanowires by molecular dynamics [20], our results are reasonable.…”

Section: Resultssupporting

confidence: 80%

“…Recently, the transition path has also been studied [11][12][13]. Experimental investigations on the phase transformation of ZnO nano-materials have appeared recently, such as ZnO nano-particles [14,15], nanorods [16], nanotubes [17], and nanocrystalline [18]. Theoretical works on the structural transition have appeared recently, such as the phase transformation in ZnO nanowires under tensile load [19,20] and the critical dimension for phase transition of nanowires [21].…”

Section: Introductionmentioning

confidence: 99%

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First‐Principles Studies on the Structural Transition of ZnO Nanowires at High Pressure

Zuo-ning

Zhang

2010

Journal of Nanomaterials

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The structural transition of ZnO nanowires at high pressures from wurtzite to rocksalt structure has been studied by first-principles density functional calculations using the SIESTA code. The size effect was studied by calculating a series of nanowires with different diameters, and the doping effect was studied by ion substitution. It is found that the critical pressure of structural transition for nanowires is lower than that of the bulk, and it decreases as the diameter of the nanowire decreases. It is also found that Mn doping can reduce the transition pressure. The size effect and doping effect are discussed in terms of the chemical bonding and energies of the nanowires.

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Section: Resultssupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

First‐Principles Studies on the Structural Transition of ZnO Nanowires at High Pressure

Zuo-ning

Zhang

2010

Journal of Nanomaterials

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“…It has been reported that nanocrystal phase transformations also depend highly on solution environment, nanocrystal surface state and aggregation of particles [18][19][20][21][22][23]. For example, the phase transformation in ZnS nanocrystals was easily induced by water, pentafluorothiophenol or thiophenol at room temperature and atmospheric pressure [18,19], because the chemical bonds between the surface zinc atom of ZnS nanocrystallites and the added solvent leaded to a dramatic structural transformation; and the addition of solvent can greatly facilitate the phase transformation of TiO 2 nanocrystals by changing the surface energy [20]; besides, the phase transformation pathway [21][22][23] in ZnS and ZnO nanoparticles with associated solvent varies with aggregation state. These reports for phase transformations in nanocrystals reveal that both the solvent effect and the initial state of starting materials play dominant factors in facilitating crystal phase transformation under mild conditions.…”

Section: Introductionmentioning

confidence: 99%

Facilitating the Phase Transformations of Boron Nitride Nanoparticles at Mild Conditions by Solvothermal Hot-Press Route

et al. 2015

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For preparing wurtzite and cubic boron nitride (wBN, cBN) under moderate conditions, here we developed a solvothermal hot-press method, by which the phase transformation of sp 3 -bonded BN in boron nitride (BN) nanoparticles was realized at quite low temperature and pressure. The results reveal that the transformation of aBN/rBN→cBN is highly dependent on the temperature, pressure and solvent promoting effect; and chlorobenzene seems to have a stronger effect on facilitating the phase transformation of sp 3 -bonded BN as compared to pyridine and aniline. Besides, the decrease in particle size and crystallinity as well as the existence of structural defects plays great roles on the phase transformations of sp 3 -bonded BN. On the basis of analyzing the experimental results, we proposed a simple model used for explaining the phase transformation process.

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“…ZnO nanoparticles have received great attentions because of their unique catalytic, electrical, electronic and optical properties as well as their low cost and extensive applications in diverse areas [24][25][26] . Nanocomposites of ZnO nanoparticles with PANI-DBSA may result in new materials with useful structures and properties.…”

Section: Introductionmentioning

confidence: 99%

Chemical Synthesis, Characterization and Thermal Analysis of Polyaniline ∕ ZnO Nanocomposite

Janu¹,

Singh²,

Singh³

et al. 2010

AIP Conference Proceedings

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Over the last three decades, conducting polymers have been extensively investigated due to their wide application potentials. Among conductive polymers, polyaniline (PANI) has been of great interest to many researchers because of its reasonably good conductivity, stability, easy preparation, affordability and redox properties. But the poor processability of PANI restricts the processability of PANI. The synthesis of processable polyaniline (PANI-DBSA) has been achieved by in situ method and its formation was confirmed by Fourier Transform Infrared (FTIR) spectroscopy. The synthesized processable polyaniline has been coated on nano ZnO powder. The composite of polyaniline and nano ZnO were characterized using Thermal Gravimetric Analysis (TGA), UV-visible and FTIR spectroscopy, X-Ray diffractometery, Photoluminescence and Scanning Electron Microscopy (SEM). The composite structure was found in the range of 30-40 nm size using different concentration level of polyaniline. The needle shaped morphology has been observed for the synthesized composite. The nano composite is being developed for various other defence applications including the sensor application.

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A novel synthesis route and phase transformation of Zno nanoparticles modified by DDAB

Cited by 19 publications

References 22 publications

First‐Principles Studies on the Structural Transition of ZnO Nanowires at High Pressure

First‐Principles Studies on the Structural Transition of ZnO Nanowires at High Pressure

Facilitating the Phase Transformations of Boron Nitride Nanoparticles at Mild Conditions by Solvothermal Hot-Press Route

Chemical Synthesis, Characterization and Thermal Analysis of Polyaniline ∕ ZnO Nanocomposite

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