Nucleation and growth of pulsed laser deposited gold on sodium chloride (100)

Zenkevitch, A.; Chevallier, J.; Khabelashvili, I. D.

doi:10.1016/s0040-6090(97)00455-0

Cited by 19 publications

(16 citation statements)

References 15 publications

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“…These differences can be explained in relation to the nucleation processes of the laser ablated species that take place on the substrate. In fact, it has been proposed 14,28,29 that defects created during layer growth by the high energetic plasma species reaching the substrate are responsible of the nucleation process. At the initial state of deposition, the dominating island-like growth results in small coverage of the surface area by clusters.…”

Section: Discussionmentioning

confidence: 99%

Gold coating of micromechanical DNA biosensors by pulsed laser deposition

Rebollar

Sanz

Esteves³

et al. 2012

Journal of Applied Physics

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Low-temperature indium-bonded alkali vapor cell for chip-scale atomic clocks J. Appl. Phys. 113, 064501 (2013) Multi-layered dielectric cladding plasmonic microdisk resonator filter and coupler Phys. Plasmas 20, 020701 (2013) Micromachined piezoelectric microphones with in-plane directivity Appl. Phys. Lett. 102, 054109 (2013) Referee acknowledgment for 2012 Biomicrofluidics 7, 010201 (2013) Introducing a well-ordered volume porosity in 3-dimensional gold microcantilevers Appl. Phys. Lett. 102, 053501 (2013) Additional information on J. Appl. Phys. In this work, we describe the gold-coating of silicon microcantilever sensors by pulsed laser deposition (PLD) and their performance as DNA biosensors. To test optimum deposition conditions for coating the sensors, silicon substrates were gold coated by PLD using the fifth harmonic of a Nd:YAG laser (213 nm, pulse duration 15 ns). The gold deposits were characterized by atomic force microscopy and x-ray diffraction. The adequate conditions were selected for coating the sensors with a 20 nm thick gold layer and subsequently functionalized with a selfassembled monolayer of thiolated DNA. To verify PLD as a tool for gold coating of biomechanical sensors, they were characterized by using a scanning laser analyzer platform. Characterization consisted in the measurement of the differential stress of the cantilevers upon hydration forces before and after functionalization with a double-stranded DNA monolayer. The measurements showed that the sensor surface stress induced by the adsorption of water molecules is approximately seven times higher than that of functionalized sensors gold coated by thermal evaporation. These results indicate that gold coating by PLD could be an advantageous method to enhance the response of biomechanical sensors based on gold-thiol chemistry. V C 2012 American Institute of Physics. [http://dx

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Section: Discussionmentioning

confidence: 99%

Gold coating of micromechanical DNA biosensors by pulsed laser deposition

Rebollar

Sanz

Esteves³

et al. 2012

Journal of Applied Physics

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“…The thickness of the Pt capping layer serving as the top electrode also has to be carefully chosen to ensure both a continuous film coverage and a sufficiently high yield of photoelectrons from the buried HfO 2−x /ZrO x /Pt interfaces. It has been previously shown that in a PLD process a continuous layer of noble metals on dielectric substrates can be achieved at coverages as small as 6 nm [20], and hence the thickness 7-10 nm was adopted for the Pt overlayer in our experiments. However, an ultrathin Pt electrode has a surface conductivity comparable with that across the HfO 2 functional layer.…”

Section: Sample Preparationmentioning

confidence: 99%

Electronic and electrical properties of functional interfaces studied by hard X-ray photoemission

Zenkevich¹,

Matveyev²,

Minnekaev³

et al. 2013

Journal of Electron Spectroscopy and Related Phenomena

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a b s t r a c tAs the device downscaling in nanoelectronics has reached the 10 nm range, the functionality of materials employed in multilayered structures to be used in future logic and memory devices is largely defined by their interface properties. In particular, the electrical properties of the functional stacks are directly related to the electronic band line-up which is affected by the electric dipoles building up at the interface(s). In this work, hard X-ray photoelectron spectroscopy is applied to probe the electronic conditions at the interfaces of several relevant multilayered functional structures and to correlate the results with their electrical (transport) properties.

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“…However, this approach usually requires thermal activation through heating the support. [3][4][5][6] Pulsed laser deposition ͑PLD͒ is well known for its superior capability for producing epitaxial growth especially for oxides. 7 In addition, it has extensively been applied to produce metal NPs on amorphous substrates for which it is well documented that PLD leads to quasispherical NPs for low metal contents and to irregularly shaped NPs due to coalescence for higher values.…”

Section: Introductionmentioning

confidence: 99%

“…8,9 The nucleation and growth mechanism of metals on dielectric substrates appear to be qualitatively similar to that of other deposition procedures such as evaporation, molecular-beam epitaxy ͑MBE͒, or sputtering, i.e., of Volmer-Weber type that happens when the atoms ͑or molecules͒ of the deposit are more strongly bound to each other than to the substrate. 22 The use of PLD for producing NPs on single-crystalline substrates has much less been studied, and even when some degree of orientation has been reported, 4 no shape changes have been highlighted with respect to what is observed on amorphous supports. In addition, shape and orientation are found to strongly depend on the kinetic energy of the species involved in the deposition process.…”

Section: Introductionmentioning

confidence: 99%

Role of substrate on nucleation and morphology of gold nanoparticles produced by pulsed laser deposition

et al. 2009

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This work compares the morphology of gold nanoparticles ͑NPs͒ produced at room temperature on singlecrystalline ͑MgO nanocubes and plates͒ and amorphous ͑carbon/glass plates͒ substrates by pulsed laser deposition ͑PLD͒. The results show that similar deposition and nucleation rates ͑Ͼ5 ϫ 10 13 cm −2 s −1 ͒ are achieved irrespective of the nature of the substrate. Instead, the shape of NPs is substrate dependent, i.e., quasispheres and faceted NPs in amorphous and single-crystalline substrates, respectively. The shape of the latter is octahedral for small NPs and truncated octahedral for large ones, with the degree of truncation being well explained using the Wulff-Kaichew theorem. Furthermore, epitaxial growth at room temperature is demonstrated for single-crystalline substrate. The large fraction of ions having energies higher than 200 eV and the large flux of species arriving to the substrate ͑10 16 at. cm −2 s −1 ͒ involved in the PLD process are, respectively, found to be responsible for the high nucleation rates and epitaxial growth at room temperature.

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Nucleation and growth of pulsed laser deposited gold on sodium chloride (100)

Cited by 19 publications

References 15 publications

Gold coating of micromechanical DNA biosensors by pulsed laser deposition

Gold coating of micromechanical DNA biosensors by pulsed laser deposition

Electronic and electrical properties of functional interfaces studied by hard X-ray photoemission

Role of substrate on nucleation and morphology of gold nanoparticles produced by pulsed laser deposition

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