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Design and performance analysis of smart photonic sensors for industrial applications
S Poonguzhali,Sivasangari A.,Ajitha P.,Lalithakumari S.,Sridevi A.,Danasegaran Sathish Kumar 한국물리학회 2022 Current Applied Physics Vol.39 No.-
Toxic gas has a median fatal concentration in the oxygen of much more than 200 parts per million (ppm) but far less than 2000 ppm by volume of gas. Many industries, mines and thermal plants emit perilous gases that are more harmful to our human life. The Proposed nanosensor senses the various perilous gases and averts many accidents. In this paper, a two-dimensional Photonic Crystal (2D-PhC) resonator and PhC-based poisonous gas sensor based on the hexagonal and square crystal lattice are built-in smart way. The PhCs are artificial constructs of any material with an occasional enunciation of refractive index (RI). It has effective light manipulation and it would be helpful to obtain light migration in the handling of sensing applications. The TE/TM wave transmission can shift as per the RI value of different gases in the PhCs. The wavelength variations obtained agree well with the Finite Difference Time Domain (FDTD) study, and the simulation is performed by the tool RSoft. The spectral variables such as quality factor (QF), sensitivity (Se), transmitted output power and detection limit (DL) are evaluated using the RI value over the spectrum of different toxic gases. The proposed square crystal structure have acquired a QF range of 500.6, high efficiency of 99%, and a better Se of 716.6 nm/RIU at 1502 nm. The designed hexagonal crystal structure have acquired a QF range of 165.8, high efficiency of 99%, and a better Se of 798.24 nm/RIU at 1630 nm respectively. The DL for both the proposed sensors is very low. So, the designed smart sensor helps promptly recognize the contaminated gases in several places. The proposed nanosensor is helpful in industrial safety, health care applications, aerospace, agricultural, transportation, environmental monitoring, thermal plants and mines.
A. Poonguzhali,S. Ningshen,G. Amarendra 대한금속·재료학회 2020 METALS AND MATERIALS International Vol.26 No.10
Corrosion fatigue behavior of type 316N stainless steel (SS) weldments on the damage characteristics is studied. The S–Ncurve of the fatigue life versus stress amplitude showed a specific two slope Basquin relationship. At low stress amplitude,the deformation microstructure consists mainly of planar slip dislocation structure and at high-stress amplitudes, planarmultiple slip dislocations govern the cyclic behavior. A correlation between microstructural changes and the correspondingsusceptibility of 316N SS weldment in as-welded condition towards environmental cracking in boiling acidified aqueoussolution has been presented. The objective of the present study is to investigate the environmental effects on the corrosionfatigue crack initiation of type 316N weldmetal under the influence of cyclic stress amplitude. The difference in deformationmicro mechanisms with stress amplitude in a corrosive environment is believed to be the major reason for the occurrence ofa specific bilinear Basquin relationship in the S–N curve.
임우종,Selvaraj Poonguzhali,마드하이안,Pitchai Palaniappan,M. A. Siddikee,사동민 한국미생물학회 2009 The journal of microbiology Vol.47 No.2
Diazotrophic bacteria isolated from the rhizosphere of Chinese cabbage were assessed for other plant growth promoting characteristics viz., production of IAA, ethylene, ACC deaminase, phosphate solubilization, and gnotobiotic root elongation. Their effect on inoculation to Chinese cabbage was also observed under growth chamber conditions. A total of 19 strains that showed higher nitrogenase activity identified by 16S rRNA gene sequence analysis were found to be the members of the genera Pseudomonas and Agrobacterium belonging to α- and γ-Proteobacteria groups. These strains were also efficient in producing IAA and ACC deaminase though they produced low levels of ethylene and no phosphate solubilization. In addition, inoculation of selected diazotrophic bacterial strains significantly increased seedling length, dry weight, and total nitrogen when compared to uninoculated control. The colonization of crop plants by diazotrophic bacteria can be affected by many biotic and abiotic factors, and further studies are oriented towards investigating the factors that could influence the establishment of a selected bacterial community.