Enhancing thermal conductivity of fluids with nanoparticles
Low thermal conduction may be a primary limitation within the development of energy-efficient heat transfer fluids that area unit needed in several industrial applications. during this paper we tend to propose that associate degree innovative new category of warmth transfer fluids may be built by suspending metallike nanoparticles in typical heat transfer fluids. The ensuing nanofluids area unit expected to exhibit high thermal conductivities compared to those of presently used heat transfer fluids, and that they represent the most effective hope for improvement of warmth transfer. The results of a theoretical study of the thermal conduction of nanofluids with copper nanophase materials area unit conferred, the potential edges of the fluids area unit calculable, and it’s shown that one in every of the advantages of nanofluids are going to be dramatic reductions in device pumping power. [1]
Applications of magnetic nanoparticles in biomedicine
The physical principles underlying some current medical specialty applications of magnetic nanoparticles are reviewed. ranging from well-known basic ideas, and drawing on examples from biology and biomedicine, the relevant physics of magnetic materials and their responses to applied magnetic fields are surveyed. The approach these properties are controlled and used is illustrated with regard to (i) magnetic separation of tagged cells and alternative biological entities; (ii) therapeutic drug, sequence and radionuclide delivery; (iii) frequency strategies for the dissimilation of tumours via hyperthermia; and (iv) distinction improvement agents for resonance imaging applications. Future prospects also are mentioned. [2]
Probing Single Molecules and Single Nanoparticles by Surface-Enhanced Raman Scattering
Optical detection and chemical analysis of single molecules and single nanoparticles are achieved at temperature with the utilization of surface-enhanced Raman scattering. Individual silver mixture nanoparticles were screened from an outsized heterogeneous population for special size-dependent properties and were then wont to amplify the qualitative analysis signatures of adsorbate molecules. For single rhodamine 6G molecules adsorbate on the chosen nanoparticles, the intrinsic Raman improvement factors were on the order of 1014 to 1015, a lot of larger than the ensemble-averaged values derived from standard measurements. This monumental improvement ends up in undulation Raman signals that ar a lot of intense and a lot of stable than single-molecule visible radiation. [3]
Aluminum with dispersed nanoparticles by laser additive manufacturing
While laser-printed metals don’t tend to match the mechanical properties and thermal stability of conventionally-processed metals, incorporating and dispersing nanoparticles in them ought to enhance their performance. However, this remains tough to try and do throughout optical maser additive producing. Here, we tend to show that Al bolstered by nanoparticles may be deposited layer-by-layer via optical maser melting of nanocomposite powders, that enhance the optical maser absorption by nearly one order of magnitude compared to pure Al powders. The optical maser written nanocomposite delivers a yield strength of up to 1000 MPa, malleability over 100 percent, and Young’s modulus of roughly 200 GPa, giving one in every of the very best specific Young’s modulus and specific yield strengths among structural metals, similarly as AN improved specific strength and thermal stability up to 400 °C compared to alternative aluminum-based materials. [4]
Antibacterial Potential of Magnesium Oxide Nanoparticles Synthesized by Aspergillus niger
A total of 280 tract infection samples were collected during this investigation. Out of them 212(75.7%) samples showed a positive response.to microorganism isolates. Morphological, cultural and organic chemistry testes were confirmed victimization VITEK a pair of System. Its disclosed that fifty four (30.2%) of the microorganism isolates were gram positive and 158 (69.8%) gram negative. The microorganism isolates were distributed as escherichia ninety six (45.2%), followed by enterobacteria respiratory disorder forty eight (22.6%), cocci aureus 43(20.3%), genus Pseudomonas aeruginosa fourteen (6.6%), and cocci epidermidis eleven (5.2%). The synthesis of mineral nanoparticles (MgO NPs) was performed victimization Aspergillus niger technique. Agar Wells Diffusion technique was applied for the analysis of medication activity against gram positive S. [5]
Reference
[1] Choi, S.U. and Eastman, J.A., 1995. Enhancing thermal conductivity of fluids with nanoparticles (No. ANL/MSD/CP-84938; CONF-951135-29). Argonne National Lab., IL (United States). (Web Link)
[2] Pankhurst, Q.A., Connolly, J., Jones, S.K. and Dobson, J., 2003. Applications of magnetic nanoparticles in biomedicine. Journal of physics D: Applied physics, 36(13), (Web Link)
[3] Nie, S. and Emory, S.R., 1997. Probing single molecules and single nanoparticles by surface-enhanced Raman scattering. science, 275(5303), (Web Link)
[4] Aluminum with dispersed nanoparticles by laser additive manufacturing
Ting-Chiang Lin, Chezheng Cao, Maximilian Sokoluk, Lin Jiang, Xin Wang, Julie M. Schoenung, Enrique J. Lavernia & Xiaochun Li
Nature Communicationsvolume 10, Article number: 4124 (2019) (Web Link)
[5] J. Ibrahem, E., M. Thalij, K. and S. Badawy, A. (2017) “Antibacterial Potential of Magnesium Oxide Nanoparticles Synthesized by Aspergillus niger”, Biotechnology Journal International, 18(1), (Web Link)
