In situ formation of reduced graphene oxide structures in ceria by combined sol–gel and solvothermal processing

• Jingxia Yang,
• Johannes Ofner,
• Bernhard Lendl and
• Ulrich Schubert

Beilstein J. Nanotechnol. 2016, 7, 1815–1821, doi:10.3762/bjnano.7.174

• band of a Si wafer. Raman mapping was performed using a 10× magnification objective and a 300 line grating; a 532 nm (frequency doubled Nd:YAG) DPSS laser was used. An area of 500 × 500 µm2 with a lateral resolution of 5 µm was mapped by scanning each pixel three times for 1 s. X-ray powder diffraction

The role of morphology and coupling of gold nanoparticles in optical breakdown during picosecond pulse exposures

• Yevgeniy R. Davletshin and
• J. Carl Kumaradas

Beilstein J. Nanotechnol. 2016, 7, 869–880, doi:10.3762/bjnano.7.79

• lasers (with pulse durations between 1 and 10 ps) are beneficial due to their cheaper operational cost, ease of maintenance and higher power specifications. Such ultrashort pulses (few picoseconds) can be achieved via using Nd:YAG and Nd:YVO4 crystals in passively modulated mode-locked lasers, which are

• , peaks is located around λ = 550 nm (Figure 3a), which is close to the second harmonic wavelength of 532 nm of popular solid- state Nd:YAG lasers. |E|max/E0 at the peak wavelength for monomers increases with increasing radius, yielding a 2.7% increase from 5 to 25 nm nanospheres (Figure 3a). The change

• (s25t@640) was 9 times higher than that of the 25 nm monomer at the resonance wavelength and 11.5 times higher than that of the 25 nm monomer (s25m@532) at the second harmonic wavelength of a Nd:YAG laser (532 nm). A plasmon-resonance shift of λshift = 80 nm can be seen when the assembly builds up from

Templated green synthesis of plasmonic silver nanoparticles in onion epidermal cells suitable for surface-enhanced Raman and hyper-Raman scattering

• Marta Espina Palanco,
• Klaus Bo Mogensen,
• Marina Gühlke,
• Zsuzsanna Heiner,
• Janina Kneipp and
• Katrin Kneipp

Beilstein J. Nanotechnol. 2016, 7, 834–840, doi:10.3762/bjnano.7.75

• collecting the scattered light. Placing the sample on a moving stage allows for the collection of SERS and SEHRS images. Two-photon excited hyper-Raman signals were generated by 1064 nm mode-locked Nd:YAG laser excitation (7 ps pulse duration, 76 MHz repetition rate). The second harmonic wave length of this

Active multi-point microrheology of cytoskeletal networks

• Tobias Paust,
• Tobias Neckernuss,
• Lina Katinka Mertens,
• Ines Martin,
• Michael Beil,
• Paul Walther,
• Thomas Schimmel and
• Othmar Marti

Beilstein J. Nanotechnol. 2016, 7, 484–491, doi:10.3762/bjnano.7.42

• the particle motion is described in [7][24][30]. The laser trapping was realized with an optical tweezers setup consisting of a Nd:YAG laser (Coherent Compass 1064-500) with a wavelength of 1064 nm and maximal power of 500 mW. The used trap stiffness of 9.8 pN/μm was calibrated and adjusted prior to

Antibacterial activity of silver nanoparticles obtained by pulsed laser ablation in pure water and in chloride solution

• Brunella Perito,
• Emilia Giorgetti,
• Paolo Marsili and
• Maurizio Muniz-Miranda

Beilstein J. Nanotechnol. 2016, 7, 465–473, doi:10.3762/bjnano.7.40

• , be justified by the larger amount of oxidized silver present on the particle surface. Experimental Preparation of AgNPs The ablation step was performed with two different lasers: a mode-locked Nd:YAG laser emitting ps pulses at 1064 nm (EKSPLA PL2143A, repetition rate 10 Hz, pulse width 25 ps) and a

• Q-switched Nd:YAG laser emitting ns pulses at 1064 nm (Quanta System CLS 400, repetition rate 10 Hz, pulse width 25 ns). The pulse energy and spot size at the target were fixed at 15 mJ and 1.4 mm and 100 mJ and 1.6 mm, for ps and ns ablation, respectively. The ablation was performed either in

Time-dependent growth of crystalline Au⁰-nanoparticles in cyanobacteria as self-reproducing bioreactors: 2. Anabaena cylindrica

• Liz M. Rösken,
• Felix Cappel,
• Susanne Körsten,
• Christian B. Fischer,
• Andreas Schönleber,
• Sander van Smaalen,
• Stefan Geimer,
• Christian Beresko,
• Georg Ankerhold and
• Stefan Wehner

Beilstein J. Nanotechnol. 2016, 7, 312–327, doi:10.3762/bjnano.7.30

• the setup. The LIBS setup arrangement consisted of a pulsed laser source, focusing optics, and Czerny–Turner spectrometers. As laser source a low-power passively Q-switched Nd:YAG laser (CryLas, model DSS1064-3000) at a wavelength of 1064 nm, a pulse energy of 2.5 mJ, a pulse duration of 2 ns (FWHM

Influence of calcium on ceramide-1-phosphate monolayers

• Joana S. L. Oliveira,
• Gerald Brezesinski,
• Alexandra Hill and
• Arne Gericke

Beilstein J. Nanotechnol. 2016, 7, 236–245, doi:10.3762/bjnano.7.22

• film balance from NIMA Technology (Coventry, UK). The microscope was equipped with a frequency-doubled Nd:YAG laser (532 nm, ca. 50 mW), a polarizer, an analyzer, and a CCD camera. When p-polarized light is directed onto the pure air/water interface at the Brewster angle (approx. 53.1°), zero

Nonlinear optical properties of near-infrared region Ag₂S quantum dots pumped by nanosecond laser pulses

• Li-wei Liu,
• Si-yi Hu,
• Yin-ping Dou,
• Tian-hang Liu,
• Jing-quan Lin and
• Yue Wang

Beilstein J. Nanotechnol. 2015, 6, 1781–1787, doi:10.3762/bjnano.6.182

• effects or positive nonlinear absorption, which reduced the nonlinear optical signal of nanoparticles [36][37][38][39][40]. Figure 3 shows the experimental setup. The pump source is a 532 nm Nd:YAG laser with tunable pulse width [41]. The repetition rate was 10 Hz. Input pump pulses were focused with an f

Nanostructuring of GeTiO amorphous films by pulsed laser irradiation

• Valentin S. Teodorescu,
• Cornel Ghica,
• Adrian V. Maraloiu,
• Mihai Vlaicu,
• Andrei Kuncser,
• Magdalena L. Ciurea,
• Ionel Stavarache,
• Ana M. Lepadatu,
• Nicu D. Scarisoreanu,
• Andreea Andrei,
• Valentin Ion and
• Maria Dinescu

Beilstein J. Nanotechnol. 2015, 6, 893–900, doi:10.3762/bjnano.6.92

• obtained by RF magnetron sputtering with 50:50 initial atomic ratio of Ge:TiO2. Laser irradiation was performed by using the fourth harmonic (266 nm) of a Nd:YAG laser. The laser-induced nanostructuring results in two effects, the first one is the appearance of a wave-like topography at the film surface

• 10 to 30 mJ/cm2 and different numbers of laser pulses in the range from 10 to 500. The laser irradiations were performed by using the fourth harmonic (λ = 266 nm) radiation of a Nd:YAG laser (Surellite II, "Continuum", USA) working in TEM00 mode, giving a maximum pulse energy of 100 mJ for the fourth

• the film surface, using the central part of the laser beam, with a diameter of 7 mm having a rather homogeneous intensity. However, at the micrometer scale the laser beam is not homogeneous, because the high coherence of the Nd:YAG laser radiation gives rise to interference effects on the target

SERS and DFT study of copper surfaces coated with corrosion inhibitor

• Maurizio Muniz-Miranda,
• Francesco Muniz-Miranda and
• Stefano Caporali

Beilstein J. Nanotechnol. 2014, 5, 2489–2497, doi:10.3762/bjnano.5.258

• , Model MultiRam), equipped with a broad range quartz beamsplitter, an air-cooled Nd:YAG laser excitation source (1064 nm) and a Ge diode detector cooled with liquid nitrogen. The instrument provided a spectral range of 3600–50 cm−1 (Stokes shift). The experiments were performed in a 180° geometry, with

Enhancement of photocatalytic H₂ evolution of eosin Y-sensitized reduced graphene oxide through a simple photoreaction

• Weiying Zhang,
• Yuexiang Li,
• Shaoqin Peng and
• Xiang Cai

Beilstein J. Nanotechnol. 2014, 5, 801–811, doi:10.3762/bjnano.5.92

• performed on a LP-920 laser flash photolysis spectrometer (Edinburgh). The excitation pulses were obtained from the unfocused second harmonic (532 nm) output of a Nd:YAG laser (Brilliant b), the probe light was provided by a Xenon short arc lamp (450 W). The measured aqueous solution was prepared as follows

Evolution of microstructure and related optical properties of ZnO grown by atomic layer deposition

• Adib Abou Chaaya,
• Roman Viter,
• Mikhael Bechelany,
• Zanda Alute,
• Donats Erts,
• Anastasiya Zalesskaya,
• Kristaps Kovalevskis,
• Vincent Rouessac,
• Valentyn Smyntyna and
• Philippe Miele

Beilstein J. Nanotechnol. 2013, 4, 690–698, doi:10.3762/bjnano.4.78

• 1 nm steps over the 300–1100 nm range, and photoluminescence in the 370–800 nm range. A solid state LCS-DTL-374QT Nd:YAG 355 nm laser source (Russia) at the intensity of 19 mW/cm2 was used to excite the luminescence. Emission spectra were registered by the experimental setup described by Viter et al

Revealing thermal effects in the electronic transport through irradiated atomic metal point contacts

• Bastian Kopp,
• Zhiwei Yi,
• Daniel Benner,
• Fang-Qing Xie,
• Christian Obermair,
• Thomas Schimmel,
• Johannes Boneberg,
• Paul Leiderer and
• Elke Scheer

Beilstein J. Nanotechnol. 2012, 3, 703–711, doi:10.3762/bjnano.3.80

• crystallites than the other one, due to the slightly different potentials applied to the two electrodes. The illumination experiments of these electrodes were carried out with a pulsed Nd:YAG laser (second harmonic, wavelength λ = 532 nm). The laser focus had a diameter of 10 µm, much smaller than the active

The morphology of silver nanoparticles prepared by enzyme-induced reduction

• Henrik Schneidewind,
• Thomas Schüler,
• Katharina K. Strelau,
• Karina Weber,
• Dana Cialla,
• Marco Diegel,
• Roland Mattheis,
• Andreas Berger,
• Robert Möller and
• Jürgen Popp

Beilstein J. Nanotechnol. 2012, 3, 404–414, doi:10.3762/bjnano.3.47

• , Jobin-Yvon–Horiba) by using a frequency-doubled Nd:YAG laser (λ = 532.11 nm) as excitation source. The spectrometer is equipped with an entrance slit of 100 µm, a focal length of 800 mm and a 300 lines/mm grating. SERS measurements were carried out by focusing the laser light onto the samples (approx

Analysis of fluid flow around a beating artificial cilium

• Mojca Vilfan,
• Gašper Kokot,
• Andrej Vilfan,
• Natan Osterman,
• Blaž Kavčič,
• Igor Poberaj and
• Dušan Babič

Beilstein J. Nanotechnol. 2012, 3, 163–171, doi:10.3762/bjnano.3.16

• , Achroplan 63/0.9W objective; Nd:YAG laser, 1064 nm, acousto-optic deflectors IntraAction and beam-steering controller Tweez by Aresis, d.o.o.). After the coarse initial positioning of the beads, the optical tweezers were switched off. The attractive force between the beads that stabilised the chain, the

Generation and agglomeration behaviour of size-selected sub-nm iron clusters as catalysts for the growth of carbon nanotubes

• Ravi Joshi,
• Benjamin Waldschmidt,
• Jörg Engstler,
• Rolf Schäfer and
• Jörg J. Schneider

Beilstein J. Nanotechnol. 2011, 2, 734–739, doi:10.3762/bjnano.2.80

• system with a base pressure in the range of 10−8 mbar is shown in Figure 5. Iron clusters were produced by a bimetallic cluster source (1) based on the laser vaporization technique: The fundamental-wavelength beam of a Nd:YAG laser (2a) with a pulse width of 8 ns and an intensity of typically 100 mJ

• /pulse was focused on an Fe rod (3), synchronized with a pulsed He flow (4) at a stagnation pressure of 6 bar and a duration of approximately 300 µs. Since only pure iron clusters were investigated in the present work the second Nd:YAG laser (2b) was switched off. The plasma generated by the laser pulse