Auditorium

A Low-Cost Non-explosive Synthesis of Graphene Oxide for Scalable Applications

 

Abstract

In this talk starting from a pre-defined problem, how certain bottlenecks encountered resulted in the above work – where we demonstrated a low cost method to synthesis a carbon based material – Graphene oxide. The work demonstrated that high quality synthesis of graphene oxide can be achieved without expensive filtration methods for carbonaceous and metallic residues. I will also outline some of the practical applications of this material which we are working on at present.

Incessant Photoluminescence from Semiconductor Nanocrystals: Challenges and Prospects

Semiconductor nanocrystals, also called quantum dots, with uninterrupted and bright photoluminescence are expected to bring groundbreaking advancements to luminescent displays, solar cells and biological imaging. Although highly-luminescent quantum dots based on cadmium and lead chalcogenides have been developed, stochastic fluctuation of photoluminescence intensity, also called blinking, continues to be a major challenge in the applications of these tiny crystals to single molecule imaging and single photon devices.

Renyi Entropy and Relative alpha-Entropy

Abstract: Renyi entropy was discovered by the Hungarian mathematician Alfred Renyi in 1961 as a measure of information alternative to Shannon entropy when one desires only a weaker form of additivity as opposed to strong additivity. Relative alpha-entropy  is the Renyi analogue of relative entropy (Kullback-Leibler divergence). In this talk I will discuss four problems, namely Campbell’s source coding problem, Massey-Arikan’s guessing problem, Huieihel et al.’s memoryless guessing problem, and Bunte-Lapidoth’s encoding of tasks problem.

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