In this research article, the development of nano antenna and energy harvesting is presented. Wirelessly interconnected devices are becoming increasingly common in today's society, forming the Internet of Things. These devices are often autonomous and continue to scale down to millimeter and even smaller dimensions, presenting major challenges for how to power them. To address this challenge, various approaches to harvesting energy from ambient or externally supplied sources have been developed, including radio-frequency, optical, mechanical, thermal, nuclear, chemical, and biological modalities. This article provides a comprehensive survey of existing approaches for energy harvesting, discussing their potential for scaling to small dimensions in the context of current technologies and possible future nanoscience developments. The article also provides an outlook on the advancements that need to be made to address the challenges of powering small-scale devices and systems. The proliferation of untethered, wirelessly interconnected devices has led to the widespread adoption of the Internet of Things (IoT). These autonomous devices, scaling down to the millimeter and sub-millimeter range, pose significant challenges in terms of providing power. In this article, we conduct a comprehensive survey of current methods for harvesting energy from ambient or externally supplied sources. These approaches encompass various modalities such as radio-frequency, optical, mechanical, thermal, nuclear, chemical, and biological sources, enabling the generation of electrical power for micro- and nano-systems. We examine the potential for scaling these energy conversion techniques to small dimensions, considering both existing technologies and potential advancements in the field of nanoscience.