Precise control over the morphology of nanostructures is critical for tailoring their physical and chemical properties. This study addresses the challenge of developing a simple, integrated method for synthesizing both 1D and 2D colloidal Cu nanostructures in a single system, achieving successful tuning of their localized surface plasmon resonance (LSPR) properties. A facile hydrothermal synthesis utilizing potassium iodide (KI) and hexadecylamine (HDA) is presented for controlling Cu nanostructure morphologies. The key to achieving 1D nanowires (NWs) and 2D nanoplates (NPs) depends on the controlled adsorption of HDA molecules and iodide (I-) ions on specific crystal facets. Depending on the morphologies, the resultant Cu nanostructures exhibit tunable LSPR peaks from 558 nm [nanoplates (NPs)] to 590 nm [nanowires (NWs)]. These results pave the way for the scalable and cost-effective production of plasmonic Cu nanostructures with tunable optical properties, holding promise for applications in sensing, catalysis, and photonic devices.

Citations

• Complexation-controlled Cu@Ag core-shell flakes for thermally stable printed electrodes in flexible energy-storage capacitors
  Seokhwan Kim, Geumseong Lee, Ye Chan Lee, Je-Hui Koo, Seonhwa Park, Geon-Tae Hwang, Mahesh Peddigari, Jungho Ryu, Dahye Shin, Kyoung Jin Jung, Kwi-Il Park, Yuho Min
  Chemical Engineering Journal.2026; 540: 177341.     CrossRef