Page No.1 Silver Nanoparticles as Efficient Alternate Drug for Bacterial Diseases Sushmita Rajput*, Yogesh Kumar Department of Applied Science and Humanities, Invertis University, Bareilly, (243123), UP. India. ABSTRACT This paper present Nanotechnology and Nanoparticles, silver nanoparticles (AgNPs), synthesis methods used to fabricate silver nanoparticles, mainly biological synthesis of AgNPs, effect of temperature on synthesis process and characterization techniques used to analyze and characterize the produced silver nanoparticles. And also, applications of AgNPs as antibacterial drugs. Nowadays we are facing the problems related to bacterial resistance of the conventional antibiotics. The treatment of bacterial infections has become a major issue of concern. Due to the unprescribed and uncontrolled use of antibiotics, bacterial strains develop resistance against conventional antibacterial diseases. Antibacterial drugs also make adverse effect on healthy organs of body along with the infect part of body. To avoid this problem concept of targeted delivery of drugs has been developed i.e. drug delivery concept. Therefore, the development of novel and potent antibacterial is required. Silver nanoparticles are potent and efficient for this purpose. Keywords: Antibacterial drugs, drug delivery, Silver nanoparticles, biomolecules, Characterization techniques, Physicochemical properties of AgNPs 1 Introduction: Nowadays the use of nanotechnology has become very popular and efficient in various fields like industries, medicine, farming, electronics, waste water treatment etc [1-3]. and has a wide area of research in the field of nanotechnology and nanoparticle physics. Nanotechnology is the science, engineering, and technology conducted at the nanoscale, which is about 1to 100 nanometres. At the nanoscale level the properties of matter are significantly different from their properties at microscopic level, or at bulk material properties. With the help of nanotechnology, we are able to design, characterize and produce nanomaterial as per our application requirement, by controlling their shape, size at nanometer scale. Physicist Richard Feynman, known as the father of nanotechnology. The idea and concept behind nanoscience and nanotechnology started with a talk entitled “There’s plenty of Room at the Bottom” by Physicist Richard Feynman at an American Physical Society meeting at the California Institute of Technology (CalTech) on 29 December 1959, long before the term nanotechnology was used. In his talk, Feynman describe a process in which scientist would be able to manipulate and control individual atoms and molecules [4]. Over a decade later, in his exploration of ultraprecision machining, Professor Nario Taniguchi coined the term Nanotechnology. It wasn’t until 1981, with the development of the scanning tunneling microscope that could see individual atoms, that modern nanotechnology began [4]. As we know that silver is a chemical element which is used in various field such as medicine, electronics and household applications. Silver has excellent conductivity it is used for making PCB (Printed Circuit bord), computer chips and switches, cell phone etc. Also, silver is good reflector of light, the reflectance property of silver is up to 95% in the visible light wavelength region and it has ability to form a