Yan, HuiDe Gea Neves, MarinaNoda, IsaoGuedes, Gonçalo M.Silva Ferreira, António C.Pfeifer, FrankChen, XinyuSiesler, Heinz W.2023-07-252023-07-252023-05-02Yan, Hui, Marina De Gea Neves, Isao Noda, Gonçalo M. Guedes, António C. Silva Ferreira, Frank Pfeifer, Xinyu Chen, and Heinz W. Siesler. 2023. "Handheld Near-Infrared Spectroscopy: State-of-the-Art Instrumentation and Applications in Material Identification, Food Authentication, and Environmental Investigations" Chemosensors 11, no. 5: 272. https://doi.org/10.3390/chemosensors110502722227-9040https://udspace.udel.edu/handle/19716/33035This article was originally published in Chemosensors. The version of record is available at: https://doi.org/10.3390/chemosensors11050272. © 2023 by the authors. Licensee MDPI, Basel, Switzerland.This present review article considers the rapid development of miniaturized handheld near-infrared spectrometers over the last decade and provides an overview of current instrumental developments and exemplary applications in the fields of material and food control as well as environmentally relevant investigations. Care is taken, however, not to fall into the exaggerated and sometimes unrealistic narrative of some direct-to-consumer companies, which has raised unrealistic expectations with full-bodied promises but has harmed the very valuable technology of NIR spectroscopy, rather than promoting its further development. Special attention will also be paid to possible applications that will allow a clientele that is not necessarily scientifically trained to solve quality control and authentication problems with this technology in everyday life.en-USnear-infrared spectroscopyhandheld instrumentationmaterial identificationfood authenticationenvironmental investigationsexploration studiesArticle