Silicon nanowires-based fluorescent sensor for in situ detection of hydrogen sulfide in extracellular environment

A selective fluorescent sensor for hydrogen sulfide was realized by covalently modifying a naphthalimide derivative onto the surface of silicon nanowires (SiNWs). The as-prepared SiNW array-based sensor was successfully employed for real-time and in situ imaging of the changes in extracellular hydrogen sulfide of HeLa cells.