Microchemistry is an interdisciplinary area in which relevant results are presented and published in a range of fields including spectroscopy, optics, applied physics, electrochemistry and polymer science. This volume collects for the first time all the latest research and results and classifies them into five parts. Optical micromanipulation and creation, microfabrication and functionalization and dynamic microspectroscopy are novel methodologies for microchemistry where exploratory ideas and future perspectives are included. Microphotochemistry and microelectrochemistry and microphotoconversion are concerned with the relaxation dynamics and chemical reactions in small domains. This comprehensive, up-to-date review of the field will be of great interest to scientists and students working in these areas.