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231224s2012 xx |||||o 00| ||eng c |
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|a 10.1021/la300219w
|2 doi
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|a pubmed24n0721.xml
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|a (DE-627)NLM216309689
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|a (NLM)22429023
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|a DE-627
|b ger
|c DE-627
|e rakwb
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| 041 |
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|a eng
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| 100 |
1 |
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|a Geldhauser, Tobias
|e verfasserin
|4 aut
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| 245 |
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|a Quantitative measurement of the near-field enhancement of nanostructures by two-photon polymerization
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|c 2012
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| 336 |
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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| 338 |
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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| 500 |
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|a Date Completed 23.10.2012
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|a Date Revised 19.06.2012
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a The quantitative determination of the strength of the near-field enhancement in and around nanostructures is essential for optimizing and using these structures for applications. We combine the gaussian intensity distribution of a laser profile and two-photon-polymerization of SU-8 to a suitable tool for the quantitative experimental measurement of the near-field enhancement of a nanostructure. Our results give a feedback to the results obtained by finite-difference time-domain (FDTD) simulations. The structures under investigation are gold nanotriangles on a glass substrate with 85 nm side length and a thickness of 40 nm. We compare the threshold fluence for polymerization for areas of the gaussian intensity profile with and without the near-field enhancement of the nanostructures. The experimentally obtained value of the near-field intensity enhancement is 600 ± 140, independent of the laser power, irradiation time, and spot size. The FDTD simulation shows a pointlike maximum of 2600 at the tip. In a more extended area with an approximate size close to the smallest polymerized structure of 25 nm in diameter, we find a value between 800 and 600. Using our novel approach, we determine the threshold fluence for polymerization of the commercially available photopolymerizable resin SU-8 by a femtosecond laser working at a wavelength of 795 nm and a repetition rate of 82 MHz to be 0.25 J/cm(2) almost independent of the irradiation time and the laser power used. This finding is important for future applications of the method because it enables one to use varying laser systems
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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7 |
|a Epoxy Compounds
|2 NLM
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|a Polymers
|2 NLM
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| 650 |
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|a SU-8 compound
|2 NLM
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| 700 |
1 |
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|a Kolloch, Andreas
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Murazawa, Naoki
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Ueno, Kosei
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Boneberg, Johannes
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Leiderer, Paul
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Scheer, Elke
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Misawa, Hiroaki
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1999
|g 28(2012), 24 vom: 19. Juni, Seite 9041-6
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
1 |
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|g volume:28
|g year:2012
|g number:24
|g day:19
|g month:06
|g pages:9041-6
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|u http://dx.doi.org/10.1021/la300219w
|3 Volltext
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