Chemosensors (ISSN 2227-9040) provides an advanced forum for the science and technology of chemical sensors and the related analytical methods. For experimental manuscripts, the full experimental details must be provided so that results can be reproduced. There are, in addition, several unique features of this journal: -Manuscripts regarding research proposals and research ideas are particularly welcomed. -Electronic files and software regarding the full details of the calculation and experimental procedure, if unable to be published in a normal way, can be deposited as supplementary material. -We also accept manuscripts communicating to a broader audience on research projects financed with public funds. Chemical Sensing Theory and Mechanisms and detection principles, including but not limited to: --Electrochemical devices and sensors --Optical chemical sensors --Mass-sensitive sensors --Field-effect transistor sensors --Catalytic sensors --Acoustic and thermal sensors Development, fabrication technology including but not limited to: --Materials for chemical sensing --Nano- and micro-technologies --Chemical assay and validation The use of the analytical method and applications in food, environmental monitoring, medicine, pharmacy, industry, agriculture, etc., including but not limited to: --Analytical apparatus --Spectroscopy --Biochemical analysis --Imaging --Bioanalytical chemistry --Quantitative analysis Classic chemical sensing topics including but not limited to: --Gas sensors, electronic nose, electronic tongue --pH sensors, humidity sensor --microfluidic devices, lab-on-a-chip, single molecule sensing, nanosensors, medical analyzers, enzymes sensors --Drug and medico-diagnostic testing