Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Binary Mixtures of SH- and CH3-Terminated Self-Assembled Monolayers to Control the Average Spacing Between Aligned Gold Nanoparticles | Nanoscale Res Lett 2009 4 1319-1323 DOI S11671-009-9399-2 NANO EXPRESS Binary Mixtures of SH- and CH3-Terminated Self-Assembled Monolayers to Control the Average Spacing Between Aligned Gold Nanoparticles Asad Rezaee Laura C. Pavelka Silvia Mittler Received 21 May 2009 Accepted 17 July 2009 Published online 2 August 2009 to the authors 2009 Abstract This paper presents a method to control the average spacing between organometallic chemical vapor deposition OMCVD grown gold nanoparticles Au NPs in a line. Focused ion beam patterned CH3-terminated selfassembled monolayers are refilled systematically with different mixtures of SH- and CH3-terminated silanes. The average spacing between OMCVD Au NPs is demonstrated systematically to decrease by increasing the v v ratio of the thiols in the binary silane mixtures with SH- and CH3-terminated groups. Keywords Average spacing FIB Gold Nanoparticle OMCVD Self-assembly Introduction Along with the other applications recent years have seen a tremendous impact on gold nanoparticle Au NP optical response in biological assays detection labeling and sensing 1 . It is of great importance to observe a pronounced shift in the localized surface plasmon resonance LSPR corresponding to an absorption peak intrinsic to Au NPs upon binding of a material onto Au NPs 2 . A. Rezaee S. Mittler El Department of Physics and Astronomy The University of Western Ontario London ON N6A 3K7 Canada e-mail smittler@ A. Rezaee e-mail arezaee@ L. C. Pavelka Department of Chemistry The University of Western Ontario London ON N6A 5B7 Canada e-mail lcpavelk@ However to achieve such a pronounced LSPR shift when only a minute amount of sample material is available or in a screening approach with many different recognition agents the volume has to be minimized and the accessibility of the analyte to the Au NPs has to be enhanced. Therefore two-dimensional approaches with organometallic chemical vapor deposited OMCVD Au NPs on a surface
