In order to collect vital information on graphene, this book is compiled in two volumes. Volume 1 is specifically meant for the beginners who want to understand the science and technology associated with the nanomaterial. The first objective of this book is to furnish detailed information on the manufacturing or syntheses of graphene and related materials in the lab without the need of special equipments. The chapters are written systematically so that it is easy to understand science, engineering and technology behind the material.
Researchers have exploited the extraordinary electrical and mechanical properties of graphene to create a very efficient electrical/sound transducer. This experimental graphene loudspeaker, without any optimized acoustic design, is simple to make and already performs comparably to or better than similar sized commercial counterparts, and with much lower power consumption. Most speakers available today reproduce sound via a mechanical diaphragm, which is displaced oscillatorily during operation. A wide-band audio speaker typically requires significant damping to broaden the response. Even without optimization, the graphene speaker is able to produce frequency response across the whole audible region, comparable or superior to performance of conventional-design commercial counterparts.