Associate Professor
Ph.D. University of Chicago
Phone: +91 80 2293 2070

Our research is aimed at understanding new physical properties that emerge in nanoscale matter. Nanostructured materials behave very differently from their bulk counterparts, and offer several opportunities and advantages over bulk materials.

We use colloidal synthetic methods to prepare a variety of semiconductor and metal nanocrystals. Optical spectroscopic methods (ultrafast and otherwise) are used to probe carrier interactions and to elucidate new phenomena that arise due to nanostructuring.

We have recently demonstrated ground state charge transfer between semiconductor nanocrystals, leading to the formation of “compounds” where individual quantum dots take the place of atoms. Such quantum dot compounds resemble ionic solids with very large atoms and exhibit unusual, counterintuitive chemical and physical properties. In a separate effort, we have also developed quantum dots with lasing thresholds of tens of milliwatts per square centimetre, lower than any other material. Yet other efforts are devoted to the development of semiconductors composed of earth abundant non-toxic elements, novel methods of synthesis and building materials with unusual properties.

  1. B. Bhattacharyya and A. Pandey,CuFeS2 Quantum Dots and highly luminescent CuFeS2 Core/Shell structures: Synthesis Tunability and PhotophysicsJ. Am. Chem. Soc. 10.1021/jacs.6b04981(2016).
  2. V. H. Iyer, R. Mahadevu and A. Pandey, Low Threshold Quantum Dot Lasers J. Phys. Chem. Lett.7, 1244, (2016).
  3. D. K. Thapa and A. Pandey, Cloning Nanostructure Morphology with Soft Templates Chem. Phys. Lett. 658, 315, (2016).
  4. R. Mahadevu and A. Pandey,Ionic Bonding between Artificial AtomsJ. Phys. Chem. C11830101(2014).
  5. R. Mahadevu, A. Yelameli, B. Panigrahy and A. Pandey, Controlling Light Absorption in Charge-Separating Core/Shell Semiconductor Nanocrystals ACS Nano 711055 (2013).