Institution
Tyndall National Institute
About: Tyndall National Institute is a based out in . It is known for research contribution in the topics: Laser & Semiconductor laser theory. The organization has 1473 authors who have published 3607 publications receiving 71911 citations.
Topics: Laser, Semiconductor laser theory, Quantum dot, Thin film, Nanowire
Papers published on a yearly basis
Papers
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TL;DR: In this paper, a cylinder-forming polystyrene-b-polydimethylsiloxane (polystyreneb-PDMS) system is applied to fabricate nanoscale features with a feature size of 14 nm.
Abstract: Block copolymer (BCP) microphase separation at substrate surfaces might enable the generation of substrate features in a scalable, bottom-up fashion, provided that the pattern structure, orientation, and alignment can be strictly controlled. The PS-b-PDMS (polystyrene-b-polydimethylsiloxane) system is attractive because it can form small features and the two blocks can be readily differentiated during pattern transfer. However, PS-b-PDMS offers a considerable challenge, because of the chemical differences in the blocks, which leads to poor surface wetting, poor pattern orientation control, and structural instabilities. These challenges are considerably greater when line patterns must be created, and this is the focus of the current work. Here, we report controlled pattern formation in cylinder-forming PS-b-PDMS by anchoring different types of hydroxyl-terminated homopolymer and random copolymer brushes on planar and topographically patterned silicon substrates for the fabrication of nanoscale templates. It is demonstrated that non-PDMS-OH-containing brushes may be used, which offers an advantage for substrate feature formation. To demonstrate the three-dimensional (3-D) film structure and show the potential of this system toward applications such as structure generation, the PDMS patterns were transferred to the underlying substrate to fabricate nanoscale features with a feature size of ~14 nm.
41 citations
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TL;DR: Simultaneous conversion of the two orthogonal phase components of an optical input to different output frequencies has been demonstrated by simulation and experiment.
Abstract: Simultaneous conversion of the two orthogonal phase components of an optical input to different output frequencies has been demonstrated by simulation and experiment. A single stage of four-wave mixing between the input signal and four pumps derived from a frequency comb was employed. The nonlinear device was a semiconductor optical amplifier, which provided overall signal gain and sufficient contrast for phase sensitive signal processing. The decomposition of a quadrature phase-shift keyed signal into a pair of binary phase-shift keyed outputs at different frequencies was also demonstrated by simulation.
40 citations
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TL;DR: In this article, the authors examined the growth of ZnO structures on Si (1 0 0) using the aqueous chemical growth (ACG) technique for deposition times of between 1 and 40 h.
40 citations
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TL;DR: The assembly of dumbbell structures as organic-inorganic hybrid materials is presented, and the concept not only enables access to novel organic/ inorganic hybrid architectures but also promises new approaches in labeling technology.
Abstract: The assembly of dumbbell structures as organic–inorganic hybrid materials is presented. Gold nanoparticles (NPs) with a mean diameter of 1.3 nm were synthesized in very good yields using a stabilizing dendrimer based on benzylic thioether subunits. The extended dendritic ligand covers the NP surface and contains a peripheral protected acetylene, providing coated and monofunctionalized NPs. These NPs themselves can be considered as large molecules, and thus, applying a wet-chemical deprotection/oxidative acetylene coupling protocol exclusively provides dimers of NPs interlinked by a diethynyl bridge. The concept not only enables access to novel organic/inorganic hybrid architectures but also promises new approaches in labeling technology.
40 citations
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17 May 2009TL;DR: This work analyses design considerations on several issues such as indoor light characteristics, solar panel component choice, maximum power point tracking, energy storage elements and the trade-offs and choices between them.
Abstract: For many wireless sensor networks applications, indoor light energy is the only ambient energy source commonly available. Many advantages and constraints co-exist in this technology. However, relatively few indoor light powered harvesters have been presented and much research remains to be carried out on a variety of related design considerations and trade-offs. This work presents a solution using the Tyndall mote and an indoor light powered wireless sensor node. It analyses design considerations on several issues such as indoor light characteristics, solar panel component choice, maximum power point tracking, energy storage elements and the trade-offs and choices between them.
40 citations
Authors
Showing all 1484 results
Name | H-index | Papers | Citations |
---|---|---|---|
Mark A. Ratner | 127 | 968 | 68132 |
Robert J. Young | 90 | 640 | 31962 |
Fabien Kéfélian | 88 | 255 | 58315 |
Rajeev Ahuja | 85 | 1072 | 32325 |
J. M. D. Coey | 81 | 748 | 36364 |
Michael Thompson | 76 | 911 | 28151 |
Thomas G. Cotter | 68 | 251 | 19556 |
Rudolf Zentel | 66 | 528 | 16757 |
Muhammad Usman | 61 | 1203 | 24848 |
Stefan Andersson-Engels | 61 | 402 | 11610 |
Justin D. Holmes | 60 | 431 | 14290 |
Michael A. Morris | 58 | 413 | 12145 |
Jean-Pierre Colinge | 57 | 458 | 19479 |
Carlo Alberto Bignozzi | 52 | 229 | 12421 |
Stephen O'Brien | 52 | 159 | 13385 |