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Atomic Force Microscopy Tip (atomic + force_microscopy_tip)
Selected AbstractsDip-Pen Nanolithography Using the Amide-Coupling Reaction with Interchain Carboxylic Anhydride- Terminated Self-Assembled Monolayers,ADVANCED FUNCTIONAL MATERIALS, Issue 8 2006S. Chi Abstract Herein we report on a new type of dip-pen nanolithography (DPN), which utilizes an interfacial organic reaction,the amide-coupling reaction,between chemically activated surfaces and amine ink molecules transferred from an atomic force microscopy tip. As a representative of the chemically activated surfaces that could react with amine compounds, we formed a self-assembled monolayer terminating in interchain carboxylic anhydride (ICA) groups on gold, and generated chemically derived nanopatterns using alkylamines as ink molecules. Amine inks showed diffusive behavior similar to thiol inks on gold in conventional DPN, and the pattern sizes were controlled by changing the tip dwell times. In addition, nanopatterns of hydrolyzed ICAs were generated by taking advantage of the participation of the water meniscus in the DPN process and the chemical nature of the ICAs. [source] Nanoscale Conducting Oxide Writing: Nanoscale Writing of Transparent Conducting Oxide Features with a Focused Ion Beam (Adv. Mater.ADVANCED MATERIALS, Issue 6 20096/2009) A conductive atomic force microscopy tip probes an embedded, optically transparent, electrically conducting oxide nanowire that was patterned on an indium oxide substrate using focused ion beam implantation. The nanowire is 160 nm wide, 7 nm deep, and theoretically limitless in length, connectivity, and shape. Nanowires of this type have potential application as interconnects in transparent electronics. Further details can be found in the article by Tobin Marks, Mark Hersam and co-workers on p.721. [source] Single-molecule near-field optical energy transfer microscopy with dielectric tipsJOURNAL OF MICROSCOPY, Issue 3 2003W. Trabesinger Summary The fluorescence lifetime and the fluorescence rate of single molecules are recorded as a function of the position of a Si3N4 atomic force microscopy tip with respect to the molecule. We observe a decrease of the excited state lifetime and the fluorescence rate when the tip apex is in close proximity to the molecule. These effects are attributed to the fact that the dielectric tip converts non-propagating near-fields to propagating fields within the dielectric tip effectively quenching the fluorescence. The spatial extension of the quenching area is of subwavelength dimensions. The results are discussed in terms of molecular fluorescence in a system of stratified media. The experiment provides surprising new insights into the interactions between a fluorescent molecule and a dielectric tip. The methodology holds promise for applications in ultra high-resolution near-field optical imaging at the level of single fluorophores. [source] Micromanipulation of organic nanofibers for blue light emitting microstructuresPHYSICA STATUS SOLIDI (A) APPLICATIONS AND MATERIALS SCIENCE, Issue 6 2006J. Kjelstrup-Hansen Abstract Controlled movement of blue light emitting organic nanofibers on dedicated substrates by micron-scaled translators and by atomic force microscopy tips is demonstrated. Successive movement of several nanofibers allows the generation of highly polarized, light emitting letters and artificial patterns with aniso- tropic emission characteristics. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source] | ||||||||||