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A review of metal nanoparticle-based surface-enhanced Raman scattering substrates for severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)detection Special Collection:Distinguished Australian Researchers

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Aggregate 2023年第5期4卷 1-11页

作者： Norhayati Abu Bakar Nur Nazhifah Yusoff Farah Shahadah Nor Azmi Joseph George Shapter Australian institute for Bioengineering and Nanotechnology University of QueenslandSt LuciaAustralia institute of microengineering and nanoelectronics Universiti Kebangsaan MalaysiaBangiMalaysia

Monitoring an infectious disease early using highly sensitive and non-invasive techniques is critical for human ***,the development of surfaceenhanced Raman scattering(SERS)for biological detection ideally fits these medical requirements and is rapidly growing as a powerful diagnostic *** can enhance the Raman signal of the target molecule by more than 106 after the adsorption of the molecule on the plasmonic nanostructured *** review provides an overview of the use of gold and silver nanoparticles in SERS substrate designs,followed by the development of these SERS substrates in severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)detection.

关键词： gold nanostars SARS-CoV-2 SERS silver nanostars

Optical Properties of CdS/PVA Nanocomposite Films Synthesized using the Gamma-Irradiation-Induced Method

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Chinese Physics Letters 2013年第5期30卷 160-164页

作者： Alireza Kharazmi Elias Saion Nastaran Faraji Nayereh Soltani Arash Dehzangi Physics Department Faculty of ScienceUniversity Putra MalaysiaSerdang 43400Malaysia institute of microengineering and nanoelectronics Universiti Kebangsaan MalaysiaBangi 43600Malaysia

Monodispersed spherical CdS nanoparticles embedded into polyvinyl alcohol (PVA) films are synthesized by using an in-situ gamma-irradiation-induced method. The formation mechanism of CdS nanoparticles capped by two united cells of PVA is purposed by means of surrounding the CdS nanoparticles with OH bonds of the PVA chain. CdS nanoparticles are found to possess an unusual orthorhombic structure in monoclinic crystalline PVA. The polymer matrix affords protection from agglomeration and controls the particle size. It is found that the distribution of the prepared nanoparticles increases and a narrower size distribution is observed when the gamma radiation is varied from 10 to 50 kGy. While the average size of the nanoparticles is found to be less affected by the variation of the gamma radiation doses. The size range of the synthesized nanoparticles is 14±1 nm. The optical absorption spectra of synthesized CdS nanoparticles in a polymer matrix reveal the blue shift in the band gap energy with respect to CdS bulk materials owing to quantum confinement effect. The photoluminescence study of nanocomposite films shows the green emission arising from the crystalline defects.

关键词： nanoparticles composite crystalline

Fast RSA decryption through high-radix scalable Montgomery modular multipliers

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Science China(Information Sciences) 2015年第6期58卷 136-151页

作者： WU Tao LI ShuGuo LIU LiTian Department of Microelectronics and nanoelectronics Tsinghua University institute of Microelectronics Tsinghua University

This paper improves the quotient-pipelined high radix scalable Montgomery modular multiplier by processing w-bit and k-bit words in carry save form instead of some(w + k)-bit length operands. It directly reduces both the critical path and the area overhead of the original processing elements. Then based on this improved high-radix scalable Montgomery modular multiplier, we propose an efficient hardware architecture for RSA decryption with Chinese Remainder Theorem. With simple configuration logics, the hardware unit works in three modes:(1) scalable modular reduction for precomputation,(2) scalable Montgomery modular multiplication for modular exponentiation, where an approximation method is developed to reduce the expanded result below the modulus, and(3) scalable multiplication for post-processing. Hardware implementation shows that the proposed architecture is optimal with reference to the literature in terms of speed, area, and frequency.A 4096-bit RSA decryption in XC2V6000-6 FPGA can be completed in 11.05 ms with 14041 slices/17409 LUTs,128 16 × 16 multipliers, and 70 kbits of block RAMs. Finally, by the use of Montogmery powering ladder the modular exponentiation unit based on the improved high radix scalable Montgomery modular multiplier can be built resistant to fault and simple power attacks. A 1024-bit modular exponentiation unit with such resistances costs about 255 K NAND2 gates in.18 μm CMOS process, and one full modular exponentiation takes about1.44 ms at 250 MHz.

关键词： RSA high radix scalable Montgomery modular multiplication CRT

Characteristics of Nb/Al superconducting tunnel junctions fabricated using ozone gas

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Chinese Physics B 2015年第9期24卷 182-186页

作者： Masahiro Ukibe Go Fujii Masataka Ohkubo nanoelectronics Research institute (nano) National Institute of Advanced Industrial Science and Technology (AIST)

To improve the energy resolution（？E） of Nb/Al superconducting tunnel junctions（STJs）, an ozone（O3） oxidation process has been developed to fabricate a thin defect-free tunnel barrier that simultaneously shows high critical current JC〉 1000 A/cm^2 and high normalized dynamic resistance RDA 〉 100 MΩ·μm^2, where A is the size of the STJ. The 50-μm^2 STJs produced by O3 exposure of 0.26 Pa·min with an indirect spray of O3 gas, which is a much lower level of exposure than the O2 exposure used in a conventional O2 oxidation process, exhibit a maximum JC= 800 A/cm^2 and a high RDA = 372 MΩ ·μm^2. The 100-pixel array of the 100-μm^2STJs produced using the same O3 oxidation conditions exhibits a constant leak current I leak= 14.9 ± 3.2 n A at a bias point around △ /e（where e is half the energy gap of an STJ）,and a high fabrication yield of 87%. Although the I leak values are slightly larger than those of STJs produced using the conventional O2 oxidation process, the STJ produced using O3 oxidation shows a ？E = 10 eV for the C-Kα line, which is the best value of our Nb/Al STJ x-ray detectors.

关键词： Nb/Al superconducting tunnel junctions high critical current density high energy resolution ozone

Fano-resonance-assisted metasurface for color routing

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Light(Science & Applications) 2017年第1期6卷 700-707页

作者： Chen Yan Kuang-Yu Yang Olivier JF Martin institute of microengineering Nanophotonics and Metrology LaboratorySwiss Federal Institute of Technology(EPFL)CH-1015 LausanneSwitzerland

Controlling the phase of an electromagnetic field using plasmonic nanostructures provides a versatile way to manipulate light at the *** phase modulation has been demonstrated using inhomogeneous metasurfaces with different geometries;however,for many applications such as filtering,hyperspectral imaging and color holography,narrowband frequency selectivity is a key *** this work,we demonstrate,both theoretically and experimentally,a narrowband metasurface that relies on Fano resonances to control the propagation of *** geometrically tuning the sub-radiant modes with respect to a fixed super-radiant resonance,we can create a phase modulation along the surface within a narrow spectral *** resulting anomalous reflection measured for such a Fano-resonant metasurface exhibits a 100 nm bandwidth and a color routing efficiency of up to 81%at a central wavelength ofλ=750 *** design flexibility provided by this Fano-assisted metasurface for colorselective light manipulation is further illustrated by demonstrating a highly directional color-routing effect between two channels,atλ=532 and 660 nm,without any crosstalk.

关键词： color filtering Fourier imaging metasurfaces plasmonic Fano resonance wavefront manipulation

An assessment study of absorption effect:LED vs tungsten halogen lamp for noninvasive glucose detection

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Journal of Innovative Optical Health Sciences 2015年第2期8卷 61-65页

作者： Nur Ain Mohd Aziz Norhana Arsad P.Susthitha Menon Sahbudin Shaari Zalhan Md Yusof Abdur Rehman Laili institute of microengineering and nanoelectronics(IMEN) Dept.of ElectricalElectronic and System Engineering Faculty of Engineering and Built Environment The National University of MalaysiaBangiSelangor Department of Photonics MIMOS Berhad57000 Technology Park MalaysiaKuala LumpurMalaysia

Noninvasive gluoose monitoring development is critical for diabetic patient continuous ***,almost all the available devices are invasive and *** methods such as using spectroscopy have shown some good ***,the drawback was that the tungsten halogen lamps 1usage that is impractical if applied on human *** paper compared the light emitting diode(LED)to traditional tungsten halogen lamps as light source for glucose detection where the type of light source plays an important role in achieving a good spectrum *** concentration measurement has been developed as part of noninvasive technique using optical *** change and overlapping in tungsten halogen results need to replace it with a more convenient light source such as *** on the result obtained,the performance of LED for absorbance spectrum gives a signifcantly different and is directly proportional to the glucose *** result shows a linear trend and scucssully detects lowest at 60 to 160 mg/dL glucose concentration.

关键词： Tungsten halogen LED glucose rflectance absorbance spectrometer

Upconversion Properties of the Er-Doped Y_(2)O_(3),Bi_(2)O_(3)and Sb_(2)O_(3)Nanoparticles Fabricated by Pulsed Laser Ablation in Liquid Media

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Chinese Physics Letters 2013年第11期30卷 188-191页

作者： Reza Zamiri Hamid-Reza Bahari-Poor Azmi Zakaria Raheleh Jorfi Golnoush Zamiri Avito Rebelo Akrajas Ali Omar Department of Physics Faculty of ScienceUniversiti Putra Malaysia43400 UPM SerdangSelangorMalaysia Department of Ceramic and Glass Engineering CICECOUniversity of AveiroAveiroPortugal institute of microengineering and nanoelectronics(IMEN) Level 4Research ComplexUniversiti Kebangsaan Malaysia43600 BangiSelangorMalaysia

Er-doped Y_(2)O_(3),Bi_(2)O_(3)and Sb_(2)O_(3)nanoparticles are synthesized using pulsed laser ablation in a *** targets of Y_(2)O_(3):Er^(3+),Bi_(2)O_(3):Er^(3+)and Sb_(2)O_(3):Er^(3+)for ablation process are prepared by standard solid-state reaction technique and ablation is carried out in 5-ml distilled water using nanosecond Q-switched Nd:YAG *** morphology and size of the fabricated nanoparticles are evaluated by transmission electron microscopy and the luminescence emission properties of the prepared samples are investigated under different excitation wavelengths.

关键词： Nd:YAG switched

On the nonclassical dynamics of cavity-assisted four-channel nonlinear coupler

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Chinese Physics B 2018年第11期27卷 498-505页

作者： Rafael Julius Abdel-Baset M A Ibrahim Pankaj Kumar Choudhury Hichem Eleuch Faculty of Applied Sciences Universiti Teknologi MARA (UiTM) Faculty of Applied Sciences Universiti Teknologi Mara (UiTM) Perak Tapah Campus institute of microengineering and nanoelectronics Universiti Kebangsaan Malaysia Department of Applied Sciences and Mathematics College of Arts and Sciences Abu Dhabi University institute for Quantum Science and Engineering Texas A&M University College Station

The non-classical properties of light propagating in four-channel Kerr waveguides, confined in an optical cavity, are studied. The solution to the Hamiltonian of field operators is obtained semi-analytically by using symmetrically ordered phase-space representation. Full quantum analysis of the input coherent fields displays a strong transition of photon property between the super-Poissonian and sub-Poissonian statistics. It is found that the cavity-assisted multichannel system exhibits enhanced squeezing both in single-and compound-mode. This multichannel system may be utilized as an efficient quantumlight generator.

关键词： squeezed states Kerr effects Langevin equation

Fabrication and characterization of superconducting RSFQ circuits

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Rare Metals 2019年第10期38卷 899-904页

作者： Gang Li Hao Li Jian-She Liu Wei Chen Tsinghua National Laboratory for Information Science and Technology Institute of MicroelectronicsDepartment of Microelectronics and NanoelectronicsTsinghua University

To meet the specification of the qubits in our laboratory,a 0.4 kA·cm^-2 superconducting rapid single flux quantum(RSFQ) circuit was designed and successfully fabricated with an improved Nb-based self-aligned lift-off *** circuit consists of a single-fluxquantum(SFQ) pulse generator,a Josephson transmission line(JTL) and a T-flip flop(TFF),and it acts as a frequency *** values of the inductors in this circuit were extracted using InductEX and the basic function of this circuit was confirmed using the simulation software WRspice before *** fabrication,the basic parameters of this circuit were measured at ~2.5 K in a Janis He-3 *** work laid the theoretical and experimental basis for the future research on the RSFQqubit control circuits.

关键词： Rapid single flux quantum Frequency divider WRspice InductEX