Macroscopic Ag nanostructure array patterns with high-density hotspots for reliable and ultra-sensitive SERS substrates  

作　　者：Taeksu Lee Soongeun Kwon San ghee Jung Hyungjun Lim Jae-Jong Lee 

机构地区：[1]Department of Nano Manufacturing Technology,Korea Institute of Machinery and Materials(KIMM),156 Gajeongbuk-Ro,Yuseong-Gu,Daejeon 34103,Republic of Korea

出　　处：《Nano Research》2019年第10期2554-2558,共5页纳米研究（英文版）

摘　　要：Syn thesis of metal nano structures arrays with large amounts of small nano-gaps on a homoge nous macroscale is of significant in terest and importa nee in chemistry,biotech no logy,physics,and nan otech no logy because of their enhan ced properties.However,the fabricatio n of uncovered nano-gaps with high-density and uniformity is rather difficult due to the complex and multiple synthetic steps.In this research,a facile and low-cost approach is demonstraind for the synthesis of high-density small nano-gaps(about 3.4 nm)between silver nanostructure array patter ns(SNAPs)over a large area.Uniform nan o?hole patter ns were periodically gen erated over an entire substrate using nano-impri nt lithography.Electrochemical reacti on at the high over-potential produced multiple silver nano crystals inside the nano-hole patter ns,gen erati ng a high-de nsity of small and un covered nano-gaps.Finally,we fully dem on strate their applicati on in the rapid detectio n of rhodamine 6G(R6G)molecules by surface-enhaneed Raman scattering(SERS)spectroscopy with a very low detection limit(1 fM)as well as excellent signal uniformity(RSD<8.0%±2.5%),i ndicati ng an extra ordinary capability for single-molecule detecti on.

关 键 词：NANOIMPRINT lithography surface-enhanced Raman scattering(SERS)spectroscopy electrodeposition nano PATTERNING gold silver 

分 类 号：O62[理学—有机化学]