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The process of electric field enhancement and molecular energy transfer near core-shell nanoparticles is compared using multipole spectral expansion based closed form expressions. It is a general notion that localized surface plasmon modes of plasmonic structures greatly enhance the molecular energy transfer between a donor-acceptor pair and the electric field intensity. Most of such studies are conducted for donor-acceptor pairs placed far away so that the bare interaction energy is very small due to its r−6 character. Relative to this tiny bare interaction energy, surface plasmon induced interaction energy may be very large, for example, in the core-shell nanoparticle, which is a hybrid plasmonic structure of a sphere and a cavity. However, when molecules are positioned very close to each other and, therefore, the Coulumbic interaction between them is very strong, the enhancement factor is found to remain quite low. Moreover, the integrated analysis and comparison of electric field enhancement and molecular energy transfer near core-shell nanoparticles has not been done. Since core-shell nanoparticles exhibit rich plasmonic features in their optical spectra, they can be used for spectral fine tuning and have found applications in cancer diagnostics. Importantly, both processes, namely, electric field enhancement and molecular energy transfer, are treated using closed form expressions derived using multipole spectral expansion. Higher order plasmonic modes are shown to play a crucial role. The present work can be directly used as a formula, e.g., for designing surface plasmon based biosensors and estimating energy exchange between proteins and excitonic interactions in quantum dots.

In the present investigation, the polycrystalline films of Cd X Zn 1-X S were prepared using a sintering technique. We coated slurry consisting of CdS, ZnS in the desired proportion-CdCl 2 (as adhesive) and ethylene glycol (as binder)-onto the glass substrates. The films were sintered at a range of temperatures in air atmosphere for the optimization of sintering temperatures using reflection spectroscopy. It was noticed that below 500°C, CdS-dominated films were obtained, and above 500°C, ZnS-dominated films were obtained. The films of desired composition giving appropriate results are obtained at 500°C. The reason is easily understood through reflection spectroscopic studies. Thus, we found 500°C to be the optimum sintering temperature and 10 min was the proper sintering time.

jointly organized the second edition of IEEE sponsored International Conference on Computing, Analytics and Networks (ICAN2020) in February 2020. The four-day conference was held for two-days in Taiwan, on February 7-8, 2020 and for two-days in India, on February 14-15, 2020. We envisioned the concept of twin-nation conference so as to provide a platform where a large number of like-minded professionals and researchers could engage and share their work, ideas and culture. Collectively, ICAN2020 received 159 paper submissions from all over the world, of which 61 submissions were accepted. This proceeding is featuring 61 papers that were presented during the conference. In addition to paper presentations, ICAN2020 also featured four keynote talks, four invited talks, two industry sessions, a panel discussion session and two tutorials. Around 200 delegates attended the conference.