Year-2019
http://dspace.iitrpr.ac.in:8080/xmlui/handle/123456789/994
2024-03-28T14:10:16ZEngineering fully organic and biodegradable superhydrophobic materials
http://dspace.iitrpr.ac.in:8080/xmlui/handle/123456789/4264
Engineering fully organic and biodegradable superhydrophobic materials
Milionis, A.; Sharma, C.S.; Hopf, R.; Uggowitzer, M.; Bayer, I.S.; Poulikakos, D.
The development of fully organic (cellulose/wax based), biodegradable, and hierarchically textured superhydrophobic material, inspired by natural, self-cleaning plants, like the Lotus leaf is reported. The developed material can reproduce in a controllable and artificial manner the chemical composition and material properties of these natural surfaces. At the same time, the fabrication protocol described here enables realization of properties beyond the ones found in the natural leaves, by allowing facile tuning of the topographical and mechanical properties. The surface topography consists of a micropillar structure assembly with, to the best of the authors' knowledge, the highest to date reported aspect ratio (7.6) for cellulose materials. Additionally, control and tunability of the material's mechanical properties are also demonstrated, which is rendered softer (down to 227 MPa Young's modulus from 997 MPa base value) by adding glycerol as a natural plasticizer. Finally, the self-cleaning properties are demonstrated and the biodegradability of the material is evaluated in a period of ≈3 months, which confirms full biodegradation. Additionally, water drop and jet impact, and folding tests demonstrate that the material can reasonably sustain its wettability properties. Such a truly bioinspired and biodegradable material system could find potential use in various bioengineering applications.
2022-12-03T00:00:00ZSensitivity analysis of critical parameters affecting the efficacy of microwave ablation using taguchi method
http://dspace.iitrpr.ac.in:8080/xmlui/handle/123456789/4259
Sensitivity analysis of critical parameters affecting the efficacy of microwave ablation using taguchi method
Singh, S.; Repaka, R.; Al-Jumaily, A.
Microwave ablation (MWA) is a minimally invasive thermal treatment modality that has already evolved as a promising alternative to radiofrequency ablation for treating different types of malignant and benign tumors, especially ≥3 cm in diameter. The efficacy of thermal ablative therapies is mainly judged by the ablation volume attained post-ablation. In this regards, the present study aims at analyzing the influence of six critical parameters, as follows, relative permittivity, electrical conductivity, volumetric heat capacity, thermal conductivity, blood perfusion rate, and applied power on the ablation volume attained during MWA. Taguchi's L27 orthogonal array has been adopted for the current problem with six input variables having three levels each. The electric and thermophysical properties considered in the study have been derived from liver, lung, breast, and kidney. Finite element method (FEM) based numerical simulations of MWA have been conducted on three-dimensional homogeneous model of biological tissue using coaxial single slot microwave antenna. Further, the ranking and the contribution of each parameter on the ablation volume attained during MWA have been quantified using analysis of variance. The corollaries drawn from the study would be useful to the clinical practitioners during the treatment planning stage of the MWA.
2022-11-30T00:00:00ZElectrochemical sensor platforms based on nanostructured metal oxides, and zeolite-based materials
http://dspace.iitrpr.ac.in:8080/xmlui/handle/123456789/4258
Electrochemical sensor platforms based on nanostructured metal oxides, and zeolite-based materials
Prathap, M.U.A.; Kaur, B.; Srivastava, R.
Electrochemical sensors have drawn significant attention over the last couple of decades because of their ability to improve detection of organic and inorganic analytes found in the field of biotechnology, environmental sciences, medicine, and food quality control. This personal account summarizes the state-of-art research carried out in the construction and evaluation of nanostructured metal oxides and zeolite based electrochemical sensors. Metal oxides and zeolite-based nanomaterials have many unique and extraordinary properties such as tunable redox activity, surface functionalization ability, optimum conductivity, large surface area, biocompatibility and so forth. In this personal account, the current advances in electrochemical sensor applications of metal oxides, zeolite-based nanomaterials, and their nanocomposites are described for the single and simultaneous determination of organic & inorganic contaminants present in water bodies, physiological bio-molecules present in human blood & urine samples, and organic contaminants present in food materials.Moreover, concluding section focuses discussion on the future developments and applications of these materials in various emerging technologies.
2022-11-30T00:00:00ZCorrigendum to ‘‘Simultaneous determination of epinephrene and paracetamol at copper-cobalt oxide spinel decorated nanocrystalline zeolite modified electrodes” [J. Colloid Interface Sci. 475 (2016) 126–135]
http://dspace.iitrpr.ac.in:8080/xmlui/handle/123456789/4195
Corrigendum to ‘‘Simultaneous determination of epinephrene and paracetamol at copper-cobalt oxide spinel decorated nanocrystalline zeolite modified electrodes” [J. Colloid Interface Sci. 475 (2016) 126–135]
Samanta, S.; Srivastava, R.
The purpose of this corrigendum is to correct the TEM image in Fig. 3c and Graphical Abstract which was inadvertently presented with
error in the published article. Therefore, this corrigendum presents Fig. 3c and Graphical Abstract in the corrected form. The overall results
& discussion, and conclusion reported in the published article are remained unaffected due to these changes. The authors would like to
apologies for any inconvenience caused.
2022-11-20T00:00:00Z