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11.
J. Boneberg J. König-Birk H.-J. Münzer P. Leiderer K.L. Shuford G.C. Schatz 《Applied Physics A: Materials Science & Processing》2007,89(2):299-303
We compare simulations of optical near-fields of single triangular nanostructures with experimental results from a near-field
ablation technique on a periodic arrangement of triangles. We find good agreement of the lateral near-field distributions;
nevertheless their dependency on the polarization of the incident light differs by 90°. Upon increasing the lateral distances
of the nanotriangle arrangement in the experiment, the polarization dependence agrees with the simulation. We conclude that
this at first sight unexpected behaviour stems from the coupling of near-fields by scattered surface waves and their interaction
with the incoming beam.
PACS 78.67.Bf; 81.07.-b 相似文献
12.
Minemoto S Muller J Gantefor G Munzer HJ Boneberg J Leiderer P 《Physical review letters》2000,84(16):3554-3557
Femtosecond time-resolved photoelectron spectroscopy is applied to study relaxation paths of excited states of mass-selected negatively charged clusters. As a first example, the lifetime of an excited state of the carbon trimer anion is measured directly. In addition, the mechanism of the decay, i.e., the configurations of the participating electronic states, is determined from the photoelectron spectra. In general, this method can be used to study all kinds of electronic excitation and relaxation processes in mass-selected nanoparticles. 相似文献
13.
Franziska Boneberg Angie Kirchner Prof. Dr. Thomas M. Klapötke Davin G. Piercey Maximilian J. Poller Jörg Stierstorfer 《化学:亚洲杂志》2013,8(1):148-159
In this work we report on the syntheses of energetic salts of cyanotetrazolate‐1‐ and ‐2‐oxides; this offers a unique ability to compare the effects of tetrazole 1‐ versus 2‐oxidation. 5‐Cyanotetrazolate‐2‐oxide can be synthesized by oxidation of the 5‐cyanotetrazolate anion with Oxone, while the corresponding 1‐oxide was synthesized by the rearrangement of azidoaminofurazan. Both chemical (multinuclear NMR, IR, and Raman spectroscopies, mass spectrometry, etc.) as well as explosive (impact, friction, and static sensitivities) properties are reported for these energetic salts. Calculated explosive performances using the EXPLO5 computer code are also reported. We furthermore detail the chemistry of these two anions, and their ability to form tetrazole‐carboxamides, dihydrotetrazines, and tetrazines. The ability to hydrolyze cyanotetrazole oxides to their amides was demonstrated by two copper complexes. Several crystal structures of these species are presented in addition to full chemical characterization. Finally, the unique 1,4,‐bis(2‐N‐oxidotetrazolate)‐1,2,4,5‐tetrazine anion was characterized as an energetic material as its ammonium salt. 相似文献
14.
J. Boneberg M. Lohrmann M. Böhmisch F. Burmeister M. Lux-Steiner P. Leiderer 《Zeitschrift für Physik B Condensed Matter》1995,99(4):567-570
We report on the conditions for the growth of triangular structures on WSe2 surfaces in scanning tunneling experiments with a vertical dimension of one layer (Se-W-Se) and up to 200 nm in horizontal direction. Experiments carried out in different atmospheres (ambient air, dry N2, dry O2) suggest that the growth is directly related to the presence of a thin physisorbed water layer on the surface of WSe2. Furthermore examinations under different scanning and bias conditions show that the electric field of the tip induces the growth of these nanometer structures. 相似文献
15.
16.
Sysoiev D Fedoseev A Kim Y Exner TE Boneberg J Huhn T Leiderer P Scheer E Groth U Steiner UE 《Chemistry (Weinheim an der Bergstrasse, Germany)》2011,17(24):6663-6672
In an attempt to design molecular optoelectronic switches functioning in molecular junctions between two metal tips, we synthesized a set of photochromic compounds by extending the π-system of 1,2-bis-(2-methyl-5-formylfuran-3-yl)perfluorocyclopentene through suitable coupling reactions involving the formyl functions, thereby also introducing terminal groups with a binding capacity to gold. Avoiding the presence of gold-binding sulphur atoms in the photoreactive centre, as they are present in the frequently used analogous thienyl compounds, the newly synthesized compounds should be more suitable for the purpose indicated. The kinetics of reversible photoswitching of the new compounds by UV and visible light was quantitatively investigated in solution. The role of conformational flexibility of the π-system for the width of the UV/Vis spectra was clarified by using quantum chemical calculations with time-dependent (TD)-DFT. As a preliminary test of the potential of the new compounds to serve as optoelectronic molecular switches, monolayer formation and photochemical switching on gold surfaces was observed by using surface plasmon resonance. 相似文献
17.
18.
Laser cleaning of polymer surfaces 总被引:2,自引:0,他引:2
T. Fourrier G. Schrems T. Mühlberger J. Heitz N. Arnold D. Bäuerle M. Mosbacher J. Boneberg P. Leiderer 《Applied Physics A: Materials Science & Processing》2001,72(1):1-6
We have investigated the removal of small spherical particles from polymer surfaces by means of 193-nm ArF and 248-nm KrF
laser light. Polystyrene (PS) particles with diameters in the range of 110 nm to 1700 nm and silica particles (SiO2) with sizes of 400 nm and 800 nm are successfully removed from two different substrates, polyimide (PI) and polymethylmethacrylate
(PMMA). Experiments were performed in air (23 °C, relative humidity 24–28%) and in an environment with a relative humidity
(RH) of about 90%.
Received: 13 July 2000 / Accepted: 14 July 2000 / Published online: 9 November 2000 相似文献
19.
B. Klipp M. Grass J. Müller D. Stolcic U. Lutz G. Ganteför T. Schlenker J. Boneberg P. Leiderer 《Applied Physics A: Materials Science & Processing》2001,73(5):547-554
A PACIS (pulsed arc cluster-ion source) developed for high average cluster-ion currents is presented. The performance of the
PACIS at different operational modes is described, and the suitability for cluster-deposition experiments is discussed in
comparison with other cluster-ion sources. Maximum currents of mass-selected cluster ions of 3–6 nA of small Sin
- (n=4–10) clusters and 0.3–0.5 nA of large Aln
+/- (n=20–70) clusters are achieved. The mass-selected cluster ions are soft-landed on a substrate at residual kinetic energies
lower than 1 eV/atom, and the samples are characterized by X-ray photoelectron spectroscopy and scanning tunneling microscopy.
First results on the soft landing of “magic” Si4
- clusters on graphite are presented.
Received: 30 May 2001 / Accepted: 14 June 2001 / Published online: 2 October 2001 相似文献
20.
I. Karakurt J. Boneberg P. Leiderer 《Applied Physics A: Materials Science & Processing》2006,83(1):1-3
We present transmission measurements through tungsten tri-oxide nanostructures and thin films prepared by sol–gel process on micro-contact printed substrates. Identical electrochromic switching times are found for both the nanostructures and the bulk films with equal thicknesses upon intercalation of H+ ions. We attribute the large change in the transmission through nanostructures at 632 nm, which can not be solely explained by absorption, to diffraction effects. PACS 73.40.Cg; 73.40.Mr; 78.20.-e; 78.67.n 相似文献