Pressure-induced evaporation dynamics of gold nanoparticles on oxide substrate

Meng, Guodong; Yanagida, Takeshi; Kanai, Masaki; Suzuki, Masaru; Nagashima, Kazuki; Bai, Xu; Zhuge, Fuwei; Klamchuen, Annop; He, Yabai; Rahong, Sakon; Kai, Shoichi; Kawai, Tomoji

doi:10.1103/physreve.87.012405

Cited by 18 publications

(17 citation statements)

References 52 publications

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“…We fabricated the microchannel on a fused silica substrate by conventional photolithography and utilized Au catalyst for VLS growth of SnO 2 nanowires (typical diameter of 10–20 nm)333435. It should be noted that we intentionally did not use electron beam lithography as we wanted to target future commercial use.…”

Section: Resultsmentioning

confidence: 99%

Ultrafast and Wide Range Analysis of DNA Molecules Using Rigid Network Structure of Solid Nanowires

Rahong

Yasui

Yanagida

et al. 2014

Sci Rep

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Analyzing sizes of DNA via electrophoresis using a gel has played an important role in the recent, rapid progress of biology and biotechnology. Although analyzing DNA over a wide range of sizes in a short time is desired, no existing electrophoresis methods have been able to fully satisfy these two requirements. Here we propose a novel method using a rigid 3D network structure composed of solid nanowires within a microchannel. This rigid network structure enables analysis of DNA under applied DC electric fields for a large DNA size range (100 bp–166 kbp) within 13 s, which are much wider and faster conditions than those of any existing methods. The network density is readily varied for the targeted DNA size range by tailoring the number of cycles of the nanowire growth only at the desired spatial position within the microchannel. The rigid dense 3D network structure with spatial density control plays an important role in determining the capability for analyzing DNA. Since the present method allows the spatial location and density of the nanostructure within the microchannels to be defined, this unique controllability offers a new strategy to develop an analytical method not only for DNA but also for other biological molecules.

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Section: Resultsmentioning

confidence: 99%

Ultrafast and Wide Range Analysis of DNA Molecules Using Rigid Network Structure of Solid Nanowires

Rahong

Yasui

Yanagida

et al. 2014

Sci Rep

Self Cite

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“…Along with the decreased density, the size of NPs also decreased accordingly with the increased dwelling time. The reduction of size may be caused by the evaporation of Au at high temperature of annealing such that when the dwelling time increases, the rate of evaporation can also increase accordingly with the increased dwelling time [ 43 ]. Consequently, when the sample was annealed at 950 °C for 150 s, the AH and LD of the Au NPs were 30.2 and 123.5 nm, respectively, as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Evolution of Self-Assembled Au NPs by Controlling Annealing Temperature and Dwelling Time on Sapphire (0001)

Lee¹,

Pandey²,

Sui³

et al. 2015

Nanoscale Res Lett

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Au nanoparticles (NPs) have been utilized in a wide range of device applications as well as catalysts for the fabrication of nanopores and nanowires, in which the performance of the associated devices and morphology of nanopores and nanowires are strongly dependent on the size, density, and configuration of the Au NPs. In this paper, the evolution of the self-assembled Au nanostructures and NPs on sapphire (0001) is systematically investigated with the variation of annealing temperature (AT) and dwelling time (DT). At the low-temperature range between 300 and 600 °C, three distinct regimes of the Au nanostructure configuration are observed, i.e., the vermiform-like Au piles, irregular Au nano-mounds, and Au islands. Subsequently, being provided with relatively high thermal energy between 700 and 900 °C, the round dome-shaped Au NPs are fabricated based on the Volmer-Weber growth model. With the increased AT, the size of the Au NPs is gradually increased due to a more favorable surface diffusion while the density is gradually decreased as a compensation. On the other hand, with the increased DT, the size and density of Au NPs decrease due to the evaporation of Au at relatively high annealing temperature at 950 °C.Electronic supplementary materialThe online version of this article (doi:10.1186/s11671-015-1200-0) contains supplementary material, which is available to authorized users.

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“…6 (c),(c- 1 ). The size reduction at a higher surface temperature associated with the density decrease is against the general trend of surface diffusion, and this can be possibly due to the enhanced evaporation of nanoscale Au as a function of AT, which can similarly witnessed on Si 43 , MgO, SrTiO 3 , and Al 2 O 3 44 . To specify the size and density evolution, the average height (AH), lateral diameter (LD) and average density (AD) are summarized in Fig.…”

Section: Resultsmentioning

confidence: 91%

From the Au nano-clusters to the nanoparticles on 4H-SiC (0001)

Zhang

Pandey

et al. 2015

Sci Rep

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The control over the configuration, size, and density of Au nanoparticles (NPs) has offered a promising route to control the spatial confinement of electrons and photons, as a result, Au NPs with a various configuration, size and density are witnessed in numerous applications. In this work, we investigate the evolution of self-assembled Au nanostructures on 4H-SiC (0001) by the systematic variation of annealing temperature (AT) with several deposition amount (DA). With the relatively high DAs (8 and 15 nm), depending on the AT variation, the surface morphology drastically evolve in two distinctive phases, i.e. (I) irregular nano-mounds and (II) hexagonal nano-crystals. The thermal energy activates adatoms to aggregate resulting in the formation of self-assembled irregular Au nano-mounds based on diffusion limited agglomeration at comparatively low annealing temperature, which is also accompanied with the formations of hillocks and granules due to the dewetting of Au films and surface reordering. At high temperature, hexagonal Au nano-crystals form with facets along {111} and {100} likely due to anisotropic distribution of surface energy induced by the increased volume of NPs. With the small DA (3 nm), only dome shaped Au NPs are fabricated along with the variation of AT from low to elevated temperature.

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Pressure-induced evaporation dynamics of gold nanoparticles on oxide substrate

Cited by 18 publications

References 52 publications

Ultrafast and Wide Range Analysis of DNA Molecules Using Rigid Network Structure of Solid Nanowires

Ultrafast and Wide Range Analysis of DNA Molecules Using Rigid Network Structure of Solid Nanowires

Evolution of Self-Assembled Au NPs by Controlling Annealing Temperature and Dwelling Time on Sapphire (0001)

From the Au nano-clusters to the nanoparticles on 4H-SiC (0001)

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