Cation-Exchanged quantum Dot-Based high-performance near-infrared photodetectors through surface treatment and passivation

Tracking Cation Exchange in Individual Nanowires via Transistor Characterization

“…Using nanostructures with specific shapes and sizes as templates, cation exchange can be utilized to achieve the desired material composition. − CdSe is an ideal template material, offering highly tunable opto-electronic properties based on various morphologies and structures accessible via a broad range of syntheses. − During cation exchange, the nanomaterial morphology is preserved, as long as the reaction zone is smaller than the nanostructure, which is important when a specific geometry is required . Transforming CdSe nanowires into Ag 2 Se nanowires by cation exchange presents a convenient method not only to overcome the lack of wet chemical synthesis routes for Ag 2 Se NWs − but also to tailor the material composition of the nanostructure …”

“…27 Transforming CdSe nanowires into Ag 2 Se nanowires by cation exchange presents a convenient method not only to overcome the lack of wet chemical synthesis routes for Ag 2 Se NWs 31−33 but also to tailor the material composition of the nanostructure. 34 In this work, cation exchange from CdSe to Ag 2 Se is studied in nanowire field-effect transistors (NWFETs) by using individually contacted nanostructures. This model system demonstrates how the electrical conductivity can be tuned over 8 orders of magnitude by cation exchange in individual nanowires.…”

“… 27 Transforming CdSe nanowires into Ag 2 Se nanowires by cation exchange presents a convenient method not only to overcome the lack of wet chemical synthesis routes for Ag 2 Se NWs 31 − 33 but also to tailor the material composition of the nanostructure. 34 …”