Panda, AbinashPukhrambam, Puspa Devi
8页查看更多>>摘要：This research addresses the design and analysis of a highly sensitive reconfigurable surface plasmon resonance (SPR) sensor for the detection of dengue virus. The SPR sensor is designed with successive layers of SF11 prism, Ag, graphene, antimony trisulphide (Sb2S3), and sensing medium. The sensing medium is infiltrated with various normal and dengue infected blood components like plasma, platelets, and hemoglobin. The angular reflectivity is investigated by employing the well-established transfer matrix method. Geometrical parameters like thickness of the Ag layer and number of graphene layer are sensibly optimized to attain high performance. The proposed structure is modelled in COMSOL Multiphysics environment to investigate the electric field intensity near the Sb2S3 and sensing medium interface. It is perceived that by switching the phase of Sb2S3 from amorphous to crystalline, the sensitivity is increased from 124.61 degrees/RIU to 180.76 degrees/RIU, 96.66 degrees/RIU to 225.75 degrees/RIU, and 127.42 degrees/RIU to 216.57 degrees/RIU for plasma, platelet and hemoglobin cell respectively.
原文链接:
NSTL
Elsevier
Balamurugan, M.Silambarasan, M.Saravanan, S.Soga, T....
6页查看更多>>摘要：In this present study, anatase and rutile mixed phase TiO2 nanoparticles have been prepared by an eco-friendly simple solution combustion method in a single step. Ethylene glycol and Ethanol were used as fuel for the combustion of titanium precursor. The prepared nanoparticles were subjected to UV-vis diffuse reflectance spectra, XRD, TEM and FTIR characterizations. The XRD reveals that the prepared TiO2 nanoparticles were in crystalline nature with various amounts of anatase and rutile phases. The weight fractions of anatase and rutile phases were controlled by varying the amount of titanium precursor. The TEM images exhibits that the prepared TiO2 are in size in the range of 20-40 nm.
原文链接:- NSTL
- Elsevier
Hu, FeneWei, ShengxianCao, YimingHe, Xijia...
7页查看更多>>摘要：The magnetic field effect on phase transition and thermal expansion properties were investigated in Ni55Mn18Ga27 alloy. The results show that the alloy has an excellent isotropy, reproducibility and thermostability in thermal strain and exhibits a large negative thermal expansion (NTE) effect in the direct and reverse martensitic transformations (MTs). For the direct MT, the average linear expansion coefficient alpha is about -225.21 ppm/K and the corresponding temperature span is around 8.2 K. Additionally, the sensitivities of the transformation strain and peak temperatures to field are about 88.5 ppm/T and 1.31 K/T, respectively. The rates of alpha and temperature spans of NTE to magnetic field are about 8.88 ppm/K T and 0.82 K/T, indicating that the magnetic field can improve the NTE property of the Ni-Mn-Ga alloy. Finally, the NTE mechanism has also been discussed. Our findings are beneficial to improving the thermal expansion and NTE properties of Ni-Mn-Ga alloys.
原文链接:- NSTL
- Elsevier
Zhang, ShaZhang, ChenhuMa, LeiMa, Tianyong...
6页查看更多>>摘要：The static magnetic properties and ferromagnetic resonance of the c-axis oriented hcp Co0.85Ir0.15 and Co0.98Ir0.02 soft magnetic films, with an easy-plane magnetocrystalline anisotropy (MA) and a c-axis MA, respectively, are investigated with temperature from 300 K down to 5 K. As the MA is opposite, opposite behavior in the temperature dependence of the effective demagnetization field Heff is observed: a decrement in Co0.98Ir0.02 film and an increment in Co0.85Ir0.15 film, respectively. Moreover, the resonance field HR(T) obtained under high frequency is different from that under low frequency for Co0.85Ir0.15 film, which is significantly different from the similar behavior in HR(T) under each frequency (6-18 GHz) for Co0.98Ir0.02 film. The fitting in HR(T) indicates that the opposite MA is also the primary reason for the different appearance in HR(T). Our findings provide supports to develop the advantages and applications of the soft magnetic films with easy-plane MA.
原文链接:- NSTL
- Elsevier
Akkera, Harish SharmaSivakumar, PeddavarapuBitla, YugandharVanga, Ganesh...
7页查看更多>>摘要：We synthesized different concentrations of Bi (1, 2, 3, 4, and 5 at %) doped SnO2 (Bi:SnO2) thin films using the sol-gel spin coating method. The XRD studies confirmed that all deposited films exhibit polycrystalline tetragonal rutile structure. Raman spectra displayed three fundamental bands at 473, 631, and 774 cm(-1), which correspond to the Raman modes E-g, A(1g), and B-2g. The average transmittance is above 76% for all films. The optical bandgap energy increased from 3.91 eV for pure SnO2 to 4.22 eV for 3 at% Bi:SnO2 film and slightly decreased for 4 and 5 at % Bi:SnO2 films. The sheet resistance (R-sh) and resistivity (rho) values decreased up to 38.8 Omega/square and 1.62 x 10(-3) Omega-cm, respectively, in 3 at % Bi: SnO2 thin film, and then slightly increased for 4 and 5 at % Bi: SnO2 films.
原文链接:- NSTL
- Elsevier
Varnosfaderani, Nazanin AlirezaeiShoushtari, Morteza ZargarGhahfarokhi, Seyed Ebrahim Mousavi
11页查看更多>>摘要：SrCo2Fe16O27 nanoparticles (NPs) were made by auto-combustion sol-gel method. Due to the high magnetic properties of SrCo2Fe16O27, this study shows how it can be used in the process of separating lead from water. Parameters affecting adsorption such as the pH, the time, the mass of the adsorbent and the temperature were investigated to optimize the adsorption. The results of the adsorption measurements of the samples showed that, under optimal conditions, 97% of the lead was removed from the solution. After the desorption process, 92.4% of the lead was removed from the solution. The results of this research can be used as an effective and economical adsorbent for Pb removal. The use of SrCo2Fe16O27 as an adsorbent has been investigated for the first time in this research. The reason for this study is the low-cost and easy method it suggests for separating lead from water.
原文链接:- NSTL
- Elsevier
Yang, MinWang, FengLv, Jia-qiLi, Bo-chen...
9页查看更多>>摘要：Using Monte Carlo simulation, the thermodynamic properties and magnetocaloric effect of a polyhedron chain with mixed spin (S, 1) were investigated in detail. The results showed that the increase of spin quantum number can enhance the magnetic properties of the system. In addition, strong exchange coupling and external magnetic field can also improve the magnetocaloric effect of the system. Finally, under the action of different parameters, the hysteresis loop of the system was studied in detail. In addition, it was found that exchange coupling, spin quantum number and external magnetic field also have important effects on the compensation behavior of the ferrimagnetic system.
原文链接:- NSTL
- Elsevier
Huang, YuanyuanChen, HengLi, DongdongZhou, Rulong...
8页查看更多>>摘要：Long-capillary simulation method was used to calculate the inter-diffusion coefficient using nonequilibrium molecular dynamics simulations. The inter-diffusion coefficient of the binary Al80Ni20, Al80Cu20, La80Ni20 and La80Al20 melts were calculated over a wide temperature range. We found that the relationship between inter-and self-diffusion coefficients of Al80Cu20 melts can be well expressed by Darken equation, which agreed with the previous results. For Al80Ni20, La80Ni20 and La80Al20 melts, dynamic cross correlation factor S was needed to correlate the Darken equation. S of Al(80)Ni(20)and La80Ni20 ranged from 0.68 to 0.92, while that of La80Al20 was larger than 1. The effect of pressure on S was further investigated. We found that S of Al80Ni20 under 30 GPa was about 0.46 at 2000K and it was much lower than that of zero pressure, which means that the pressure had a great influence on S. Our investigations provided an improved understanding of cross correlation factor S.
原文链接:- NSTL
- Elsevier
Tamta, SurajDahiya, AnnuKumar, Pandian Senthil
11页查看更多>>摘要：Core-shell type nanostructures (metal nanoparticles decorated dielectric spheres) are of particular interest based on their application potentials ranging from catalysis, bio-sensing to optical devices because of their inherent characteristic physico-chemical properties. Herein, we utilized silica (SiO2) as the dielectric cores and Ag as the metal shell nanostructures. In this study, we carefully modified the conventional Stober process for the in-situ one step synthesis as well as functionalization of large and highly uniform silica particles with the universally soluble homogenous polymer PVP (polyvinyl pyrrolidone). This facilitates cohesive control of uniform mass transfer of Ag+ metal ions onto the silica surface, thereby enabling their sequential reduction to zerovalent Ag atoms (in the presence of slightly excess NaOH), as confirmed from the detailed spectroscopic and microscopic measurements. The precise role of PVP in the stabilization as well as sequential reduction of the Ag nanoparticles onto the dielectric silica surface is prudently demonstrated through FTIR data analysis. The nonlinear dependence of the plasmonic peak wavelength on the refractive index (RI) describes the intriguing light-matter interaction of core-shell type nanostructures, disentangling the surface plasmon contribution at the dielectric-metal interfaces in a rigorous manner, quantifying the plasmonic ultra-sensitivity and figure of merit of our as-prepared optical metamaterials.
原文链接:- NSTL
- Elsevier
Ghellab, T.Charifi, Z.Baaziz, H.Latteli, H....
17页查看更多>>摘要：Analyses based on first-principles simulations have revealed new details about the mechanical and thermody-namic characteristics of NaBH4 and NaAlH4 complex hydrides in alpha, beta and gamma phases. Using the quasi-harmonic Debye model, thermal parameters like the Debye temperature, the heat capacity, and the thermal expansion coefficient of NaXH4 (X = B, Al) complex hydrides are calculated in alpha, beta and gamma phases at different pressures and temperatures for the first time. Single-crystal elastic constants may be derived from the stress-strain relationship calculations. Although NaBH4 has a stronger compressibility modulus than NaAlH4, the distance dB-H is shorter than dAl-H, which may be explained by the presence of the covalent bond in BH4 and AlH4 in NaXH4 (X = B, Al). The melting points of NaXH4 (X = B, Al) may be used to estimate the decomposition temperatures of hydrogen. beta-NaXH4 has a higher melting point than alpha-NaXH4. Thus, the decomposition temperature of NaXH4 at which hydrogen is released from a fuel cell is expected to be lower than that of NaBH4. beta-NaBH4 has a more directed bonding tendency than alpha-NaAlH4 does. Except for the phase gamma-NaAlH4, the NaXH4 (X = B, Al) compounds are ductile. NaBH4 deforms more than NaAlH4 in uniaxial deformation, yet both are centrally strong solids. Our PBE calculations result in the linear compressibility and orientation-dependent Young's modulus. Tetragonal beta-NaBH4 and alpha-NaAlH4 structures have an isotropic bulk modulus but an anisotropic Young's modulus.
原文链接:- NSTL
- Elsevier
