One-step surfactant-free photoreduction synthesis of single-crystal silver triangular nanoprisms by surface modified chemically patterned ferroelectric crystals for SERS application

Large-area arrays of epitaxially aligned silver nanotriangles seeded by gold nanostructures

“…These efforts have largely centered around three strategies: (i) the adhesion of colloidal seeds to a functionalized substrate surface followed by its exposure to a liquid-state chemical environment conducive to nanoplate formation, 33–38 (ii) electrochemical syntheses that form nanoplates directly on an electrode surface, 39–43 and (iii) through the exposure of a synthetically active substrate to aqueous AgNO 3 where chemical reactions involving the substrate material allow the synthesis to proceed. 44–47 These methodologies are, however, less than optimal in that the majority have resulted in the formation of disorganized networks of nanoplates where size and shape uniformity is absent and where the nanoplates, more often than not, have a growth trajectory that is away from the substrate surface. Even though nanoplates are produced in high yield, the nanotriangle geometry has only rarely been observed 35,44 and the deterministic placement of individual structures on the substrate surface has not yet been achieved.…”

“…44–47 These methodologies are, however, less than optimal in that the majority have resulted in the formation of disorganized networks of nanoplates where size and shape uniformity is absent and where the nanoplates, more often than not, have a growth trajectory that is away from the substrate surface. Even though nanoplates are produced in high yield, the nanotriangle geometry has only rarely been observed 35,44 and the deterministic placement of individual structures on the substrate surface has not yet been achieved. With a recent resurgence in interest in the integration of single-crystal nanometals with wafer-based techniques, 4,48–56 addressing these unmet challenges in nanometal synthesis becomes a priority.…”