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A chemical route to increase hot spots on silver nanowires for surface-enhanced Raman spectroscopy application

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : A chemical route to increase hot spots on silver nanowires for surface-enhanced Raman spectroscopy application
นักวิจัย : Goh, Madeline Shuhua , Lee, Yih Hong , Pedireddy, Srikanth , Phang, In Yee , Tjiu, Weng Weei , Tan, Joel Min Rui , Ling, Xing Yi
คำค้น : DRNTU::Science::Chemistry.
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2555
อ้างอิง : http://hdl.handle.net/10220/11338 , http://dx.doi.org/10.1021/la302795r
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Langmuir
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

The effective number of surface-enhanced Raman spectroscopy (SERS) active hot spots on plasmonic nanostructures is the most crucial factor in ensuring high sensitivity in SERS sensing platform. Here we demonstrate a chemical etching method to increase the surface roughness of one-dimensional Ag nanowires, targeted at creating more SERS active hot spots along Ag nanowire’s longitudinal axis for increased SERS detection sensitivity. Silver nanowires were first synthesized by the conventional polyol method and then subjected to chemical etching by NH4OH and H2O2 mixture. The surfaces of silver nanowires were anisotropically etched off to create miniature “beads on a string” features with increased surface roughness while their crystallinity was preserved. Mapping of single-nanowire SERS measurements showed that the chemical etching method has overcome the limitation of conventional one-dimensional Ag nanowires with limited SERS active area at the tips to produce etched Ag nanowires with an increase in Raman hot spots and polarization-independent SERS signals across tens of micrometers length scale.

บรรณานุกรม :
Goh, Madeline Shuhua , Lee, Yih Hong , Pedireddy, Srikanth , Phang, In Yee , Tjiu, Weng Weei , Tan, Joel Min Rui , Ling, Xing Yi . (2555). A chemical route to increase hot spots on silver nanowires for surface-enhanced Raman spectroscopy application.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Goh, Madeline Shuhua , Lee, Yih Hong , Pedireddy, Srikanth , Phang, In Yee , Tjiu, Weng Weei , Tan, Joel Min Rui , Ling, Xing Yi . 2555. "A chemical route to increase hot spots on silver nanowires for surface-enhanced Raman spectroscopy application".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Goh, Madeline Shuhua , Lee, Yih Hong , Pedireddy, Srikanth , Phang, In Yee , Tjiu, Weng Weei , Tan, Joel Min Rui , Ling, Xing Yi . "A chemical route to increase hot spots on silver nanowires for surface-enhanced Raman spectroscopy application."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2555. Print.
Goh, Madeline Shuhua , Lee, Yih Hong , Pedireddy, Srikanth , Phang, In Yee , Tjiu, Weng Weei , Tan, Joel Min Rui , Ling, Xing Yi . A chemical route to increase hot spots on silver nanowires for surface-enhanced Raman spectroscopy application. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2555.