Book excerpt: Molecular Logic Gates and Luminescent Sensors Based on Photoinduced Electron Transfer, by A. Prasanna de Silva and S. Uchiyama; Luminescent Chemical Sensing, Biosensing, and Screening Using Upconverting Nanoparticles, by D. E. Achatz, R. Ali, and O. S. Wolfbeis; Luminescence Amplification Strategies Integrated with Microparticle and Nanoparticle Platforms, by S. Zhu, T. Fischer, W. Wan, A. B. Descalzo, and K. Rurack; Luminescent Chemosensors Based on Silica Nanoparticles, by S. Bonacchi, D. Genovese, R. Juris, M. Montalti, L. Prodi, E. Rampazzo, M. Sgarzi, and N. Zaccheroni; Fluorescence Based Sensor Arrays, by R. Paolesse, D. Monti, F. Dini, and C. Di Natale; Enantioselective Sensing by Luminescence, by A. Accetta, R. Corradini, and R. Marchelli