Abstract: Bulk nanobubbles (BN) are a novel type of nanoscale bubble system. They are spherical with a typical diameter of 100-200 nm, and they exist in bulk liquid. The most peculiar characteristic of these BN is their extraordinary longevity. Existing theories, however, predict a huge inner gas pressure (typically around 30 atm.) and, consequently, molecular diffusion theory would predict that they would dissolve extremely quickly - on a timescale of about 1 microsecond. From a scientific point of view, the mystery behind the longevity of BN has led to many different speculations as to the reasons for this phenomenon. However, reports are sparse, and in the main conflicting and have not been independently validated. An aspect to be considered is that nanobubbles are not macroscopic systems and so everyday thermodynamics is not reliable. Furthermore, atomistic simulations on this scale are only now becoming feasible. To fully exploit the potential benefits of BN, our understanding of the fundamental rules governing their existence and behaviour needs to be substantially improved. The work aims to investigate and identify the fundamental principles by which BNBs originate, form, and persist (stable for long periods of time), and elucidate some of their unique properties using a combination of experimental, computational, and theoretical approaches.
Bio: Ananda Jadhav did his BTech (ICT Mumbai, 2010), ME (IIT Roorkee, 2013) and PhD (ICT Mumbai, 2017). He did his postdoctoral research in the university of Birmingham, UK, 2017-22, followed by a stint at Bharti Vidyapeeth, Pune as Ramanjuan fellow. Currently he is in ICT Mumbai as an assistant professor. He has a bachelor's degree in pharmaceutical chemistry and technology, a master's degree in chemical engineering, and doctoral research work in chemical engineering, material science, and nanotechnology. Additionally, he has expertise in the analytical characterization, interpretation of nanoscale materials, and has post-doctoral research experience in the recently emerged bulk nanobubble field and experimental; as well as experimental and theoretical experience in multiphase systems.