People during Ph.D.: I would like to thank my PhD supervisors, Dr. Subhra Datta and Dr. Dinesh Kalyanasundaram for their support and guidance. I would like to thank chairman of SRC, Prof P. M. V. Subbarao, and other SRC members for critical review and valuable suggestions. I specially want to thank Dr. Manjinder Singh and Dr. Mainendra Dewangan for their constant motivation and emotional support. I am thankful to research scholars in La. faBIO. M.D. and Micro/nanofluidics lab, for their help and support.

People during M.Tech.: I would like to thank my M.Tech. supervisor, Prof. Shantanu Bhattacharya for guidance, critical review and valuable suggestions. I want to thank Dr. Rishi Kant, Dr. Ankur Gupta, Ms. Monalisha and other lab members of Micro-Fabrication Laboratory. I specially want to thank Soumya Mukherjee, Arpan Kedia, Shyam Sunder, Javed Asgar and Pawan Basera for making my stay at IIT Kanpur comfortable and enjoyable.

People at IISc Bangalore: I want to thanks to Prof. Ashitava Ghoshal and Prof. G. K. Ananthsuresh for their guidance, support and teachings. I learnt robotics, compliant mechanisms and microfabrication techniques in M2D2 lab. I will never forget my comfortable and joyful stay at IISc Bangalore. I like the teaching of Prof. C. S. Jog and Prof. Rudra Pratap, which provided me a deep insight of FEM and dynamics. I would like to thank Dr. nandini, Dr. Ramnath, Dr. Shanthanu, Saurabh and Deepa for taking care of me and behaving nice to me.

People during my schooling: I am highly obliged to Umesh Sharma sir, T. Sing sir, Late. R. P. Sing sir, N. Prasad sir, Y. K. Pandey sir and S. Mzumdar sir. I would like to specially thanks Mr. Umesh Sharma sir for guiding me in my journey of life.

Special thanks: A very special thanks to Prof. G. V. Prakash (IIT Delhi) for his suggestions and guidance. Last but not the least, I would like to thank Dr. Manjinder Singh, Mr. Arpan Kedia and Mr. Divyajyoti for their emotional support during my bad phase of life. I sincerely extend my sincere gratitude to all (who directly or indirectly of IIT Delhi, IIT Kanpur, IISc Bangalore and my work place) for providing me extended support and encouraged time to time. At the end, I thank God and my family members for blessings and bestowing moral strength to conduct research work.