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      https://www.ias.ac.in/article/fulltext/pram/084/03/0387-0394

    • Keywords

       

      Dendritic solidification; branched structures; diffusion limited growth.

    • Abstract

       

      Shining a tightly-focussed but low-powered laser beam on an absorber dispersed in a biological fluid gives rise to spectacular growth of dendritic patterns. These result from localized drying of the fluid because of efficient absorption and conduction of optical energy by the absorber. We have carried out experiments in several biologically relevant fluids and have analysed patterns generated by different types of absorbers. We observe that the growth velocity of branches in the dendritic patterns can decrease below the value expected for natural drying.

    • Author Affiliations

       

      Kiran M Kolwankar1 Pulkit Prakash2 Shruthi Radhakrishnan2 Swadhini Sahu2 Aditya K Dharmadhikari3 Jayashree A Dharmadhikari4 Deepak Mathur3

      1. Department of Physics, Ramniranjan Jhunjhunwala College, Ghatkopar(W), Mumbai 400 086, India
      2. Department of Physics, University of Mumbai, Vidyanagari, Santacruz East, Mumbai 400 098, India
      3. Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400 005, India
      4. Department of Atomic and Molecular Physics, Manipal University, Manipal 576 104, India

    • Dates

       
      Published
      March 2015
      Early published
      5 February 2015

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