In this paper, the nanosized silver particles with a narrow size distribution and high dispersivity located in both interior and exterior layers of montmorillonite as a confinement reactor by a chemical reduction meth...In this paper, the nanosized silver particles with a narrow size distribution and high dispersivity located in both interior and exterior layers of montmorillonite as a confinement reactor by a chemical reduction method were prepared. It was found that the obvious changes of the particle size and dispersivity of the nanosilver located in both interior and exterior layers of montmorillonite did not occur after being treated by supercritical ethanol dried at the temperature of 270 ℃ and proven that the nanosilver/montmorillonite composites had a good thermal stability, which will have some potential applications as a high activity catalyst, antibacterial agents etc.展开更多
Using composite field arithmetic in Galois field can result in the compact Rijndael S-Box. However, the power con- sumption of this solution is too large to be used in resource-limited embedded systems. A full-custom ...Using composite field arithmetic in Galois field can result in the compact Rijndael S-Box. However, the power con- sumption of this solution is too large to be used in resource-limited embedded systems. A full-custom hardware implementation of composite field S-Box is proposed for these targeted domains in this paper. The minimization of power consumption is implemented by optimizing the architecture of the composite field S-Box and using the pass transmission gate (PTG) to realize the logic functions of S-Box. Power simulations were performed using the netlist extracted from the layout. HSPICE simulation results indicated that the proposed S-Box achieves low power consumption of about 130 μW at 10 MHz using 0.25 μm/2.5 V technology, while the consumptions of the positive polarity reed-muller (PPRM) based S-Box and composite field S-Box based on the conventional CMOS logic style are about 240 μW and 420 μW, respectively. The simulations also showed that the presented S-Box obtains better low-voltage operating property, which is clearly relevant for applications like sensor nodes, smart cards and radio frequency identification (RFID) tags.展开更多
基金This work was financially supported by the Natural Science Foundation of China(21925110,21890751,91745113)the National Program for Support of Top-Notch Young Professionals+9 种基金USTC Research Funds of the Double First-Class Initiative(YD2060002004)the Key R&D Program of Shandong Province(2021CXGC010302)the Major Program of Development Foundation of Hefei Center for Physical Science and Technology(2016FXZY001)the Users with Excellence Project of Hefei Science Center CAS(2021HSCUE004)the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB36000000)the Anhui Provincial Natural Science Foundation(1808085MB26)The authors also appreciate the support from the beamline 1W1B of Beijing Synchrotron Radiation Facility(BSRF,Beijing,China)the beam-lines BL11U,BL10B,and BL12B-a of National Synchrotron Radiation Laboratory(NSRL,Hefei,China)the fellowship of China National Postdoctoral Program for Innovative Talents(BX2021280)the fellowship of China Postdoctoral Science Foundation(2022M710141).
文摘In this paper, the nanosized silver particles with a narrow size distribution and high dispersivity located in both interior and exterior layers of montmorillonite as a confinement reactor by a chemical reduction method were prepared. It was found that the obvious changes of the particle size and dispersivity of the nanosilver located in both interior and exterior layers of montmorillonite did not occur after being treated by supercritical ethanol dried at the temperature of 270 ℃ and proven that the nanosilver/montmorillonite composites had a good thermal stability, which will have some potential applications as a high activity catalyst, antibacterial agents etc.
基金Project supported by the Hi-Tech Research and Development Program (863) of China (No. 2006AA01Z226)the Scientific Research Foundation of Huazhong University of Science and Technol-ogy (No. 2006Z001B), China
文摘Using composite field arithmetic in Galois field can result in the compact Rijndael S-Box. However, the power con- sumption of this solution is too large to be used in resource-limited embedded systems. A full-custom hardware implementation of composite field S-Box is proposed for these targeted domains in this paper. The minimization of power consumption is implemented by optimizing the architecture of the composite field S-Box and using the pass transmission gate (PTG) to realize the logic functions of S-Box. Power simulations were performed using the netlist extracted from the layout. HSPICE simulation results indicated that the proposed S-Box achieves low power consumption of about 130 μW at 10 MHz using 0.25 μm/2.5 V technology, while the consumptions of the positive polarity reed-muller (PPRM) based S-Box and composite field S-Box based on the conventional CMOS logic style are about 240 μW and 420 μW, respectively. The simulations also showed that the presented S-Box obtains better low-voltage operating property, which is clearly relevant for applications like sensor nodes, smart cards and radio frequency identification (RFID) tags.
