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RISS 인기검색어
- 검색키워드
- 저자 : Kessler, Berthold (검색결과 49 건)
- 무료
- 기관 내 무료
- 유료
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Kessler, Daniel,Jochum, Florian D.,Choi, Jiyeon,Char, Kookheon,Theato, Patrick American Chemical Society 2011 ACS APPLIED MATERIALS & INTERFACES Vol.3 No.2
<P>Reactive surface coatings were used as an ideal precursor coating for the fabrication of three different photoswitchable surface coatings in parallel. Different light-responsive moieties, such as azobenzene, salicylideneaniline, and spiropyran, were immobilized on glass, polycarbonate, and steel surfaces. Independent from the underlying substrate, wettability could be switched reversibly by UV irradiation. The maximum switching range was obtained after functionalization of the reactive coating with spiropyran, resulting in a contact angle difference between the two isomeric states of almost 30°.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/aamick/2011/aamick.2011.3.issue-2/am1010892/production/images/medium/am-2010-010892_0005.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/am1010892'>ACS Electronic Supporting Info</A></P>
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Fiber Laser Welding in the Car Body Shop - Laser Seam Stepper versus Remote Laser Welding -
Kessler, Berthold The Korean Welding and Joining Society 2013 대한용접·접합학회지 Vol.31 No.4
The excellent beam quality of high power fiber lasers are commonly used for remote welding applications in body job applications. The Welding speed and productivity is unmatched with any other welding technology including resistance spot welding or traditional laser welding. High tooling cost for clamping and bulky safety enclosures are obstacles which are limiting the use. With the newly developed Laser stitch welding gun we have an integrated clamping in the process tool and the laser welding is shielded in a way that no external enclosure is needed. Operation of this laser welding gun is comparable with resistance spot welding but 2-times faster. Laser stitch welding is faster than spot welding and slower than remote welding. It is a laser welding tool with all the laser benefits like welding of short flanges, weld ability of Ultra High Strength steel, 3 layers welding and Aluminium welding. Together with low energy consumption and minimum operation cost of IPG fiber laser it is a new and sharp tool for economic car body assembly.
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Kessler, Daniel,Lechmann, Maria C.,Noh, Seunguk,Berger, Rü,diger,Lee, Changhee,Gutmann, Jochen S.,Theato, Patrick WILEY-VCH Verlag 2009 Macromolecular rapid communications Vol.30 No.14
<P>Optoelectronic devices usually consist of a transparent conductive oxide (TCO) as one electrode. Interfacial engineering between the TCO electrode and the overlying organic layers is an important method for tuning device performance. We introduce poly(methylsilsesquioxane)–poly(N,N-di-4-methylphenylamino styrene) (PMSSQ–PTPA) as a potential hole-injection layer forming material. Spin-coating and thermally induced crosslinking resulted in an effective planarization of the anode interface. HOMO level (−5.6 eV) and hole mobility (1 × 10<SUP>−6</SUP> cm<SUP>2</SUP> · Vs<SUP>−1</SUP>) of the film on ITO substrates were measured by cyclovoltammetry and time-of-flight measurement demonstrating the hole injection capability of the layer. Adhesion and stability for further multilayer built-up could be demonstrated. Contact angle measurements and tape tests after several solvent treatments proved the outstanding film stability.</P><P> <img src='wiley_img/10221336-2009-30-14-MARC200900196-gra001.gif' alt='wiley_img/10221336-2009-30-14-MARC200900196-gra001'> </P> <B>Graphic Abstract</B> <P>Poly(methylsilsesquioxane)–poly(N,N-di-4-methylphenylamino styrene) (PMSSQ–PTPA) as potential hole-injection layer (HIL) forming material was used for effective planarization of the anode interface. The obtained HIL showed high stability and adhesion even after several solvent treatments. <img src='wiley_img/10221336-2009-30-14-MARC200900196-content.gif' alt='wiley_img/10221336-2009-30-14-MARC200900196-content'> </P>
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Fiber Laser Welding in the Car Body Shop - Laser Seam Stepper versus Remote Laser Welding -
Berthold Kessler 대한용접접합학회 2013 대한용접·접합학회지 Vol.31 No.4
The excellent beam quality of high power fiber lasers are commonly used for remote welding applicationsin body job applications. The Welding speed and productivity is unmatched with any other welding technologyincluding resistance spot welding or traditional laser welding. High tooling cost for clamping and bulkysafety enclosures are obstacles which are limiting the use. With the newly developed Laser stitch welding gun we have an integrated clamping in the process tool andthe laser welding is shielded in a way that no external enclosure is needed. Operation of this laserwelding gun is comparable with resistance spot welding but 2-times faster. Laser stitch welding is faster than spot welding and slower than remote welding. It is a laser weldingtool with all the laser benefits like welding of short flanges, weld ability of Ultra High Strength steel, 3layers welding and Aluminium welding. Together with low energy consumption and minimum operation costof IPG fiber laser it is a new and sharp tool for economic car body assembly.
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