This book describes the recent development in chemical sciences.Chemistry has become an interdiscliplinary area in the recent times.This has been demonstrated by the rapid advancement both in theoretical as well as applied chemistry. The book titled "Modern Aspect in Chemistry" consists of four chapters. The first chapter is devoted to nanomaterials in terms of benefits and potential risks. The second chapter is devoted to self-assembled monolayer of thiocholesterol on gold. The third chapter describes about DNA biosensors and biochips. The final chapter illustrates the various computational techniques used in theoretical chemistry.