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Articles 1 - 9 of 9
Full-Text Articles in Physical Sciences and Mathematics
Confning Tio2 Nanotubes In Pecvd‑Enabled Graphene Capsules Toward Ultrafast K‑Ion Storage: In Situ Tem/Xrd Study And Dft Analysis, Jingsheng Cai, Ran Cai, Zhongti Sun, Xiangguo Wang, Nan Wei, Feng Xu, Yuanlong Shao, Peng Gao, Shi Xue Dou, Jingyu Sun
Confning Tio2 Nanotubes In Pecvd‑Enabled Graphene Capsules Toward Ultrafast K‑Ion Storage: In Situ Tem/Xrd Study And Dft Analysis, Jingsheng Cai, Ran Cai, Zhongti Sun, Xiangguo Wang, Nan Wei, Feng Xu, Yuanlong Shao, Peng Gao, Shi Xue Dou, Jingyu Sun
Australian Institute for Innovative Materials - Papers
© 2020, © 2020, The Author(s). Titanium dioxide (TiO2) has gained burgeoning attention for potassium-ion storage because of its large theoretical capacity, wide availability, and environmental benignity. Nevertheless, the inherently poor conductivity gives rise to its sluggish reaction kinetics and inferior rate capability. Here, we report the direct graphene growth over TiO2 nanotubes by virtue of chemical vapor deposition. Such conformal graphene coatings effectively enhance the conductive environment and well accommodate the volume change of TiO2 upon potassiation/depotassiation. When paired with an activated carbon cathode, the graphene-armored TiO2 nanotubes allow the potassium-ion hybrid capacitor full cells to harvest an energy/power …
In Operando Mechanism Analysis On Nanocrystalline Silicon Anode Material For Reversible And Ultrafast Sodium Storage, Lei Zhang, Xianluo Hu, Chaoji Chen, Haipeng Guo, Xiaoxiao Liu, Gengzhao Xu, Haijian Zhong, Shuang Cheng, Peng Wu, Jiashen Meng, Yunhui Huang, Shi Xue Dou, Hua-Kun Liu
In Operando Mechanism Analysis On Nanocrystalline Silicon Anode Material For Reversible And Ultrafast Sodium Storage, Lei Zhang, Xianluo Hu, Chaoji Chen, Haipeng Guo, Xiaoxiao Liu, Gengzhao Xu, Haijian Zhong, Shuang Cheng, Peng Wu, Jiashen Meng, Yunhui Huang, Shi Xue Dou, Hua-Kun Liu
Australian Institute for Innovative Materials - Papers
Presently, lithium-ion batteries (LIBs) are the most promising commercialized electrochemical energy storage systems. Unfortunately, the limited resource of Li results in increasing cost for its scalable application and a general consciousness of the need to find new type of energy storage technologies. Very recently, substantial effort has been invested to sodium-ion batteries (SIBs) due to their effectively unlimited nature of sodium resources. Furthermore, the potential of Li/Li+ is 0.3 V lower than that of Na/Na+, which makes it more effective to limit the electrolyte degradation on the outer surface of the electrode.[1] Nevertheless, one major obstacle for the commercial application …
Analysis Of Low-Field Isotropic Vortex Glass Containing Vortex Groups In Yba2cu3o7−X Thin Films Visualized By Scanning Squid Microscopy, Frederick Wells, Alexey V. Pan, Renshaw Wang, Sergey Fedoseev, Hans Hilgenkamp
Analysis Of Low-Field Isotropic Vortex Glass Containing Vortex Groups In Yba2cu3o7−X Thin Films Visualized By Scanning Squid Microscopy, Frederick Wells, Alexey V. Pan, Renshaw Wang, Sergey Fedoseev, Hans Hilgenkamp
Australian Institute for Innovative Materials - Papers
The glass-like vortex distribution in pulsed laser deposited YBa2Cu3O7 − x thin films is observed by scanning superconducting quantum interference device microscopy and analysed for ordering after cooling in magnetic fields significantly smaller than the Earth's field. Autocorrelation calculations on this distribution show a weak short-range positional order, while Delaunay triangulation shows a near-complete lack of orientational order. The distribution of these vortices is finally characterised as an isotropic vortex glass. Abnormally closely spaced groups of vortices, which are statistically unlikely to occur, are observed above a threshold magnetic field. The origin of these groups …
Synthesis, Structural Analysis, And Thermal Decomposition Studies Of [(Nh3)2bh2]B3h8, Zhenguo Huang, Hima K. Lingam, Xuenian Chen, Spencer Porter, Aijun Du, Patrick M. Woodard, Sheldon Shore, Ji-Cheng Zhao
Synthesis, Structural Analysis, And Thermal Decomposition Studies Of [(Nh3)2bh2]B3h8, Zhenguo Huang, Hima K. Lingam, Xuenian Chen, Spencer Porter, Aijun Du, Patrick M. Woodard, Sheldon Shore, Ji-Cheng Zhao
Australian Institute for Innovative Materials - Papers
Boron–nitrogen containing compounds with high hydrogen contents as represented by ammonia borane (NH3BH3) have recently attracted intense interest for potential hydrogen storage applications. One such compound is [(NH3)2BH2]B3H8 with a capacity of 18.2 wt% H. Two safe and efficient synthetic routes to [(NH3)2BH2]B3H8 have been developed for the first time since it was discovered 50 years ago. The new synthetic routes avoid a dangerous starting chemical, tetraborane (B4H10), and afford a high yield. Single crystal X-ray diffraction analysis reveals N–Hd+…Hd2–B dihydrogen interactions in the [(NH3)2BH2]B3H8?18- crown-6 adduct. Extended strong dihydrogen bonds were observed in pure [(NH3)2BH2]B3H8 through crystal structure solution …
Critical Phenomena And Estimation Of The Spontaneous Magnetization By A Magnetic Entropy Analysis In Mn0.96nb0.04coge Alloy, Jyotish C. Debnath, A M. Strydom, P Shamba, Jianli Wang, S X. Dou
Critical Phenomena And Estimation Of The Spontaneous Magnetization By A Magnetic Entropy Analysis In Mn0.96nb0.04coge Alloy, Jyotish C. Debnath, A M. Strydom, P Shamba, Jianli Wang, S X. Dou
Australian Institute for Innovative Materials - Papers
Magnetic and magnetocaloric properties of the alloy Mn0.96Nb0.04CoGe have been investigated.
Intergrain Connectivity Of Mgb2 Ceramics Studied By Impedance Analysis, C.C Wang, C Wang, Rong Zeng, S X. Dou
Intergrain Connectivity Of Mgb2 Ceramics Studied By Impedance Analysis, C.C Wang, C Wang, Rong Zeng, S X. Dou
Australian Institute for Innovative Materials - Papers
First, by using of the conventional Rowell analysis, we demonstrated that the addition of nano BN particles can effectively eliminate MgO and pores in MgB2 resulting in a very high density and good connectivity of BN-doped MgB2. Then, another method—low-frequency dielectric impedance analysis—was introduced to characterize the properties of the grain boundaries of MgB2. A comparative impedance study was performed in the frequency range from 100 Hz to 100 MHz on pure and nano BN-doped MgB2. The study revealed some following interesting results: (1) a dielectric resonance around frequency of 108 in both samples …
Microstructural And Compositional Analysis Of Strontium-Doped Lead Zirconate Titanate Thin Films On Gold-Coated Silicon Substrates, S Sriram, M Bhaskaran, D Rg Mitchell, K T. Short, A Holland, A Mitchell
Microstructural And Compositional Analysis Of Strontium-Doped Lead Zirconate Titanate Thin Films On Gold-Coated Silicon Substrates, S Sriram, M Bhaskaran, D Rg Mitchell, K T. Short, A Holland, A Mitchell
Australian Institute for Innovative Materials - Papers
This article discusses the results of transmission electron microscopy ~TEM!-based characterization of strontium-doped lead zirconate titanate ~PSZT! thin films. The thin films were deposited by radio frequency magnetron sputtering at 3008C on gold-coated silicon substrates, which used a 15 nm titanium adhesion layer between the 150 nm thick gold film and ~100! silicon. The TEM analysis was carried out using a combination of high-resolution imaging, energy filtered imaging, energy dispersive X-ray ~EDX! analysis, and hollow cone illumination. At the interface between the PSZT films and gold, an amorphous silicon-rich layer ~about 4 nm thick! was observed, with the film composition …
Distributed Polarizability Analysis For Para-Nitroaniline And Meta-Nitroaniline: Functional Group And Charge-Transfer Contributions, Marc In Het Panhuis, R W. Munn, P L A Popelier
Distributed Polarizability Analysis For Para-Nitroaniline And Meta-Nitroaniline: Functional Group And Charge-Transfer Contributions, Marc In Het Panhuis, R W. Munn, P L A Popelier
Australian Institute for Innovative Materials - Papers
Topological partitioning of electronic properties is used to investigate the polarizability of para-nitroaniline and meta-nitroaniline. The distributed polarizabilities for atoms are combined into total local or generalized distributed contributions for the amino, ring, and nitro functional groups; generalized distributed group contributions have not been calculated before. The local group contributions are transferable between the two molecules only when charge transfer is suppressed, but the generalized distributed contributions prove surprisingly similar in the two molecules, apparently because they treat charge-transfer contributions explicitly.
Analysis Of Linear And Quadratic Optical Response Of Mixed Langmuir-Blodgett Films Of Stearic Acid And 5-Ct, Marc In Het Panhuis, R W. Munn
Analysis Of Linear And Quadratic Optical Response Of Mixed Langmuir-Blodgett Films Of Stearic Acid And 5-Ct, Marc In Het Panhuis, R W. Munn
Australian Institute for Innovative Materials - Papers
Published experimental optical second-harmonic generation (SHG) results for mixed films formed between stearic acid and the mesogen 5-CT (4″-n-pentyl-4-cyano-p-terphenyl) are reanalyzed. Experimental refractive index results for the pure films are used to deduce molecular polarizabilities in order to calculate local fields. At low and high fractions of 5-CT, a consistent interpretation of the SHG is obtained using a mean molecular response based on a fixed axial hyperpolarizabilityβLLL for the mesogen, but at high mesogen fractions molecular tilt makes small off-diagonal componentsβLLM≈−βLLL/40 essential. At intermediate fractions the treatment can interpret …