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Using the Langmuir–Schaefer technique to fabricate large-area dense SERS-active Au nanoprism monolayer films

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Using the Langmuir–Schaefer technique to fabricate large-area dense SERS-active Au nanoprism monolayer films
นักวิจัย : Lee, Yih Hong , Lee, Choon Keong , Tan, Baorui , Tan, Joel Ming Rui , Phang, In Yee , Ling, Xing Yi
คำค้น : DRNTU::Science::Chemistry.
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2556
อ้างอิง : Lee, Y. H., Lee, C. K., Tan, B., Tan, J. M. R., Phang, I. Y., & Ling, X. Y. (2013). Using the Langmuir–Schaefer technique to fabricate large-area dense SERS-active Au nanoprism monolayer films. Nanoscale, 5(14), 6404-6412. , http://hdl.handle.net/10220/17066 , http://dx.doi.org/10.1039/c3nr00981e
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Nanoscale
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Interfacial self-assembly of nanoparticles is capable of creating large-area close-packed structures for a variety of applications. However, monolayers of hydrophilic cetyltrimethylammonium bromide (CTAB)-coated Au nanoparticles are challenging to assemble via interfacial self-assembly. This report presents a facile and scalable process to fabricate large-area monolayer films of ultrathin CTAB-coated Au nanoprisms at the air–water interface using the Langmuir–Schaefer technique. This is first achieved by a one-step functionalization of Au nanoprisms with poly(vinylpyrrolidone) (PVP). PVP functionalization is completed within a short time without loss of nanoprisms due to aggregation. Uniform and near close-packed monolayers of the Au nanoprisms formed over large areas ([similar]1 cm2) at the air–water interface can be transferred to substrates with different wettabilities. The inter-prism gaps are tuned qualitatively through the introduction of dodecanethiol and oleylamine. The morphological integrity of the nanoprisms is maintained throughout the entire assembly process, without truncation of the nanoprism tips. The near close-packed arrangement of the nanoprism monolayers generates large numbers of hot spots in the 2D arrays in the tip-to-tip and edge-to-edge inter-particle regions, giving rise to strong surface-enhanced Raman scattering (SERS) signals. When deposited on an Au mirror film, additional hotspots are created in the 3rd dimension in the gaps between the 2D nanoprism monolayers and the Au film. SERS enhancement factors reaching 104 for non-resonant probe molecules are achieved.

บรรณานุกรม :
Lee, Yih Hong , Lee, Choon Keong , Tan, Baorui , Tan, Joel Ming Rui , Phang, In Yee , Ling, Xing Yi . (2556). Using the Langmuir–Schaefer technique to fabricate large-area dense SERS-active Au nanoprism monolayer films.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Lee, Yih Hong , Lee, Choon Keong , Tan, Baorui , Tan, Joel Ming Rui , Phang, In Yee , Ling, Xing Yi . 2556. "Using the Langmuir–Schaefer technique to fabricate large-area dense SERS-active Au nanoprism monolayer films".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Lee, Yih Hong , Lee, Choon Keong , Tan, Baorui , Tan, Joel Ming Rui , Phang, In Yee , Ling, Xing Yi . "Using the Langmuir–Schaefer technique to fabricate large-area dense SERS-active Au nanoprism monolayer films."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2556. Print.
Lee, Yih Hong , Lee, Choon Keong , Tan, Baorui , Tan, Joel Ming Rui , Phang, In Yee , Ling, Xing Yi . Using the Langmuir–Schaefer technique to fabricate large-area dense SERS-active Au nanoprism monolayer films. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2556.