The many applications of nanosensors can be broadly categorized into biomedical, environmental, agriculture, and food industries. Biomedical applications can be further broken down into the use of nanosensors in cancer diagnosis and treatment, health monitoring using wearable sensors, detection of pathogens including bacterial species, detection of illicit drugs including opioids as well as blood glucose detection and biological imaging. Drug discovery is another major subset of biomedical applications and incorporates the use of nanosensors in highthroughput screening to identify viable lead compounds. In our document dataset, biomedical applications of nanosensors outweigh/contribute to a larger extent as compared to other applications (Figure ) accounting for nearly ~82% and ~80% of journal and patent publications. In the paragraphs that follow, we have described in detail a few of these applications.