IOSR-JAP   Volume-14 ~ Issue-5 ~ Sep. – Oct. 2022

ABSTRACT: The removal of bacteria from water is an extremely important process for drinking and sanitation systems, especially against bacteria and fungi. Cadmium Stannate (Cd2SnO4) is a peculiar and promising material, that received much attention from scientific perspectives and industries for its excellent structural, optical and electrical properties. In this present work, cubic phase Cd2SnO4 nanoparticles have been synthesized by the chemical precipitation method. XRD, FESEM, EDAX, FTIR, PL and UV analysis have been performed to study the structural, surface morphological, elemental composition and optical properties. The antibacterial activities of the nanoparticles......

Keywords: Cd2SnO4 nanoparticles, XRD, FESEM, EDAX, FTIR, Antibacterial activity

[1]. M. M. Khin, A. S. Nair, V. J. Babu, R. Murugan, and S. Ramakrishna, Energy & Environmental Science, 5(8) (2012)8075–8109 . https://doi.org/10.1039/C2EE21818F
[2]. W.-W. Tang, G.-M. Zeng, J.-L. Gong, Science of the Total Environment,468-469(2014)1014–1027
http://dx.doi.org/10.1016/j.scitotenv.2013.09.044
[3]. J. Yan, L. Han, W. Gao, S. Xue, and M. Chen, Bioresource Technology, 175(2015)269–274 https://doi.org/10.1016/j.biortech.2014.10.103
[4]. F. Liu, J. H. Yang, J. Zuo, Journal of Environmental Sciences, 26(8)(2014)1751–1762 http://dx.doi.org/10.1016/j.jes.2014.06.016
[5]. R. S. Kalhapure, S. J. Sonawane, D. R. Sikwal, Colloids and Surfaces B: Biointerfaces, 136(2015)651–658 https://doi.org/10.1016/j.colsurfb.2015.10.003.

ABSTRACT: The distinguishing optoelectronic properties of all-inorganic CsPbX3 (X = Cl, Br, I) have attracted intense attention of the materials research community and therefore, in the research focus today. Here, we report on the conventional single-step chemical vapor deposition (CVD) grown all-inorganic CsPbBr3 nanopillars. These nanopillars have atomically smooth surfaces and truncated nano-cone like geometrical shapes. The structural uniqueness of the halide nanopillars makes them excellent photoemitters. Ultraviolet He-Cd laser excitations (λ⁓320 nm) of the nanopillars exhibited dual color photoluminescence emissions respectively in the blue (λ⁓460 nm) and green (λ⁓530 nm) emission regions of the visible spectral range. Surface smoothness along with unique structural geometry make the all-inorganic CsPbBr3 halide nanopillars potential for future optoelectronic......

Keywords: All-inorganic halides; chemical vapor deposition; nanopillars; dual color photoluminescence emission.

[1]. Li, X. et al. All Inorganic Halide Perovskites Nanosystem: Synthesis, Structural Features, Optical Properties and Optoelectronic Applications. Small13, 1–24 (2017).
[2]. Mo, X. et al. All-inorganic perovskite CsPbBr3 microstructures growth: Via chemical vapor deposition for high-performance photodetectors. Nanoscale11, 21386–21393 (2019).
[3]. Qiu, T. et al. Recent advances in one-dimensional halide perovskites for optoelectronic applications. Nanoscale10, 20963–20989 (2018).
[4]. Mi, Y. et al. Fabry–Pérot Oscillation and Room Temperature Lasing in Perovskite Cube-Corner Pyramid Cavities. Small14, 1–8 (2018).
[5]. Edri, E., Kirmayer, S., Cahen, D. & Hodes, G. High open-circuit voltage solar cells based on organic-inorganic lead bromide perovskite. J. Phys. Chem. Lett.4, 897–902 (2013).

ABSTRACT: Background: Wearable health monitors are noticed for effectively grasping the conditions of patients and aged peoples. And, various sensors for attaching to body parts such as lists, fingers, and chests are under developments. The sensors and their attachment parts are often made using flexible flat sheets. However, it is often better to make them on curved flexible or bendable shells or solid parts just fitting to the body parts. For this reason, a simple and low-cost methodfor printing 50-200 μm patterns on arbitrarily curved surfaces was invented using a magic mirror system composed of parabolic mirrors. In the past research, 200-μm L&S patterns on a transparent reticle placed at the lower mirror aperture were projected in the upper mirror aperture.However, successfully patterned areas were limited to the field center. Therefore, it is necessary to extend the patterning area to the whole exposure field......

Keywords: Stereophonic lithography; Parabolic-mirror; One-sided illumination; Collimated light; Patterning area; Field distortion

[1]. X. Haoa, L. Wanga, Q. Wanga, F. Guoa, Y. Tanga, Y. Dinga, B. Lua, Surface micro-texturing of metallic cylindrical surface with proximity rolling-exposure lithography and electrochemical micromachining.Applied Surface Science.2011; 257: 8906-8911.
[2]. D. Lee, H. Hiroshima, Y. Zhang, T. Itoh, R. Maeda, Cylindrical projection lithography for microcoil structures. Microelectronic Engineering. 2011; 88: 2625–2628.
[3]. H. Lim, K. Choi, G. Kim, S. Lee, H. Park, J. Ryu, S. Jung, J. Lee, Roll-to-roll nanoimprint lithography for patterning on a large-area substrate roll. Microelectronic Engineering. 2014; 123: 18–22.
[4]. S. Chun Tseng, W. Y. Peng, Y. F. Hsieh, P. J. Lee, W. L. Lai, Electron beam lithography on cylindrical roller. Microelectronic Engineering. 2010; 87: 943–946.
[5]. U. Tahira, M. A. Kamrana, M. H. Janga, M. Y. Jeong, Thin-film coating on cylinder for fabrication of cylindrical mold: Roll-to-roll nano-imprint lithography. Microelectronic Engineering. 2019; 211:5-12.

ABSTRACT: A heat wave is a weather phenomenon that is distinguished by marked heating of the air, or with the invasion of very hot air, over a large area. In the present study, the Weather Research and Forecasting (WRF) model was tested through 30 different combinations of radiation parameterization schemes to simulate the regional weather over the Bangladesh. The main objective was to investigate the response to the radiation parameters schemes for dynamic down-scaling of weather variables. The temperature from the 30 different WRF setups were compared with the BMD observed data and were found sensitive to the radiation physics. The 30 combination of radiation physics along with the fixed WRF Single-moment 3-class microphysics, Kain-Fritiches cumulus physics, Noah Land Surface......

Keywords: Heat wave, radiation scheme and regional modeling

[1]. Bohnenstengel, S. I., Evans, S., Clark, P. A., Belcher, S. E. (2011). Simulations of the London urban heat island. Q. J. R. Meteorol. Soc. 137, 1625–1640.
[2]. Braga, A.L.F., Zanobetti, A. and Schwartz, J. (2001). The time course of weather-related deaths. Epidemiology 12, 662–667.
[3]. Curriero, F. C., Heiner, K. S., Samet, J. M., Zeger, S. L., Strug, L., Patz, J. A. (2002). Temperature and mortality in 11 cities of the eastern United States. Am. J. Epidemiol. 155, 80–87.
[4]. Das, S., Smith, S. C. (2012). Awareness as an adaptation strategy for reducing mortality from heat waves: Evidence from a disaster risk management program in India. Clim. Chang. Econ. 03(2), 1250010. http://dx.doi.org/10.1142/S2010007812500108
[5]. De, U. S., Khole, M. and Dandekar, M. (2004). Natural hazards associated with meteorological extreme events. Nat. Hazards 31, 487–497

ABSTRACT: Recently, two unknown particle flows named Aether Wind and Aether Inflow have been reported which can cause time dilation and change of light speed at different moving directions and speeds of an object or event (clock or light source) with respect to the local gravitational fields. However, according to Yangton and Yington Theory, photon is a free Wu's Pair traveling in vacuum space. Like other moving particles, there is no need of any carrier. Therefore, it is believed that those unknown particles (Aethers), instead of light carriers, they are actually gravitons. In fact, Aether Inflow is the Static Graviton Flux passing through the target object emitted from the parent object......

Keywords: Aether, Aether Wind, Aether Inflow, Graviton, Graviton Flux, Static Graviton Flux, Dynamic Graviton Flux, Yangton and Yington, Graviton Radiation and Contact Interaction, Wu's Spacetime Shrinkage Theory, Time Dilation.

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