Tunneling spectroscopy of isolated gold clusters grown on thiol/dithiol mixed self-assembled monolayers

Sakotsubo, Yukihiro; Ohgi, Taizo; Fujita, Daisuke; Ootuka, Youiti

doi:10.1016/j.physe.2005.06.036

Cited by 18 publications

(18 citation statements)

References 9 publications

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“…171 The self-capacitance of a single deposited Au NP on octanedithiol/ Au (111) was strongly dependent on the surface coverage and its diameter. [172][173][174][175][176] Sakotsubo et al reported that the density of evaporated clusters can be controlled by using thiol-dithiolmixed SAMs. 176 Their results suggest that an isolated Au NP is appropriate for investigating the Coulomb blockade behavior at room temperature because the surrounding Au NPs display a parasitic capacitance and decrease the charging energy.…”

Section: Single-electron Transport Of Single Nanoparticlesmentioning

confidence: 99%

Nanoparticle characterization based on STM and STS

2015

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In this review, we describe recent progress made in the study of nanoparticles characterized by scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS). Basic principles of STM measurements and single-electron tunneling phenomena through a single NP are summarized. We highlight the results of electrical and photonic properties on NPs studied by STM and STS. Because nanoparticles are single-digit nanometre in diameter, a single-electron transport on individual nanoparticles such as Coulomb blockade and resonant tunneling through discrete energy levels are investigated. Photon-emission from NPs is also introduced based on STM measurements. Novel single-nanoparticle functions such as stochastic blinking and one-write erasing behaviours are presented. This review provides an overview of nanoparticle characterization methods based on STM and STS that include the detailed understanding of the electrical and photonics properties of nanoparticles.

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Section: Single-electron Transport Of Single Nanoparticlesmentioning

confidence: 99%

Nanoparticle characterization based on STM and STS

2015

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“…In order to get well-organized SAMs, the quality of the gold surface is a key parameter. In the literature several types of supports have been used, ranging from polycrystalline gold, to Au(111) single crystal 23,27 and to vacuum gold evaporation onto various supports such as freshly cleaved mica sheets, 22,24,25,[31][32][33][34][35][36] glass [29][30][31]37 and silicon wafers. 26,[38][39][40] In all cases one obtains large flat Au(111) terraces.…”

Section: Experimental Sam Preparationmentioning

confidence: 99%

“…XPS, UPS, single wavelength ellipsometry, STM/AFM, SIMS, RAIRS, SFG, contact angle measurements, cyclic voltammetry etc. [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40] Despite the relatively large amount of work done, the conditions for the reproducible formation of well ordered SAMs with free SH endgroups are still debated. 21,[41][42][43][44] It is well known that the formation of alkanethiol SAMs proceeds through two steps: first, formation of a so-called striped phase with the alkyl chains lying parallel to the gold support and then formation of the so-called standing up phase.…”

Section: Introductionmentioning

confidence: 99%

On the self assembly of short chain alkanedithiols

Hamoudi

Guo

Prato

et al. 2008

Phys. Chem. Chem. Phys.

104

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A study of the self-assembly of nonane-alkanedithiol monolayers on gold in n-hexane and ethanol solvents is presented. Self-assembled monolayers (SAMs) are characterised by reflection-absorption infrared spectroscopy (RAIRS), sum frequency generation (SFG) and spectroscopic ellipsometry (SE) measurements. Data obtained for alkanethiols SAMs are also shown for comparison. The measurements show that nicely organized HSC9SH SAMs can be obtained in n-hexane provided that N2-degassed solutions are used and all preparation steps are performed in the absence of ambient light. SFG measurements show that these SAMs have free standing SH groups. Use of an un-degassed and/or light-exposed n-hexane solutions leads to a worse layer organization. Preparation in ethanol, even in degassed solutions with processing in the dark, leads to poorly organized layers and no sign of free -SH groups was observed.

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“…A variety of studies of SET effects for metallic nanoparticles in a DBTJ configuration have been performed since the early 1990s [5,7,[10][11][12][13]. Nevertheless, SET phenomena are still being intensively studied nowadays [14][15][16][17] the SET properties are extremely sensitive to the particle dimensions and to the resistances and capacitances in the DBTJ, a good knowledge and understanding of the entire system is essential in order to be able to create reliable SET systems for possible future applications.…”

Section: Introductionmentioning

confidence: 99%

Single-electron tunneling phenomena on preformed gold clusters deposited on dithiol self-assembled monolayers

et al. 2008

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We report on detailed low temperature scanning tunneling spectroscopy measurements performed on preformed nanometer sized gold clusters. The clusters are deposited on Au(1 1 1) films that are coated with a self-assembled monolayer of 1,4-benzenedimethanethiol molecules, thereby creating a double barrier tunnel junction. In this configuration electrons can only move between the scanning tunneling microscope tip and the substrate through tunneling via the cluster. Due to the very small cluster size this results in pronounced singleelectron tunneling effects. Anomalies in the I(V) curves measured above a single cluster can be consistently described in terms of charging of the double barrier junction for the majority of the particles. Both Coulomb blockade and Coulomb staircase with step widths in the 200-600 meV range were observed on various individual clusters. The results agree with the commonly used semiclassical theory of charging effects in a double barrier tunnel junction. Furthermore, for a limited number of clusters, additional conductance peaks are observed which are attributed to strong electron confinement inside the nanoscale clusters.

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Tunneling spectroscopy of isolated gold clusters grown on thiol/dithiol mixed self-assembled monolayers

Cited by 18 publications

References 9 publications

Nanoparticle characterization based on STM and STS

Nanoparticle characterization based on STM and STS

On the self assembly of short chain alkanedithiols

Single-electron tunneling phenomena on preformed gold clusters deposited on dithiol self-assembled monolayers

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