Article

Single electron tunneling and manipulation of nanoparticles on surfaces at room temperature

Department of Chemistry, University of California, 95616, Davis, CA, USA; Department of Chemistry and Biochemistry, University of California, 95064, Santa Cruz, CA, USA
Surface Science (Impact Factor: 1.84). 07/2005; 589(1). DOI: 10.1016/j.susc.2005.05.061

ABSTRACT This article focuses on surfaces containing nanoparticles and self-assembled monolayers (SAMs). These surfaces provide a simple and reliable platform for measurements of single electron tunneling (SET) properties of metal nano-particles at room temperature. This approach of interfacial chemistry allows for the elimination of lateral motion of the individual nanoparticles during electronic property studies. The scanning tunneling microscopy (STM) in ultra-high vacuum is used as an accurate and reproducible probe for imaging and I–V characterization of individual or aggregated Au nanoparticles, revealing a large Coulomb gap (1.0 eV) and fine Coulomb staircases (0.2–0.3 eV) at room tempera-ture. The surrounding decanethiol SAM provides an ideal reference for the imaging and I–V measurements of nano-particles. These measurements provide a quantitative guide for regulating current and voltage, at which individual Au nanoparticles may be detached and manipulated with the STM tip.

0 Bookmarks
 · 
51 Views
  • [Show abstract] [Hide abstract]
    ABSTRACT: The electromagnetic (EM) coupling between metal nanoparticles (NPs) is of essential importance in nanoplasmonic systems, leading to a variety of fundamental studies and practical applications. The successive investigations in this field not only bring forward surprising optical effects in nanoplasmonics, but also allow revealing other novel chemical/physical properties in relevant systems. In this article, we will discuss the EM coupling in four types of typical plasmonic nanostructures, i.e., single aggregated metal NPs, asymmetric metal NPs dimers, nano-manipulated metal NPs and supported metal NPs on a substrate, and outlook the corresponding impacts in understanding physics and extending applications.
    Physical Chemistry Chemical Physics 02/2013; 15(12):4100-9. · 3.83 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The use of nanoparticle materials in the manufacture of electronic polymer memory devices is on the rise. Organic memory devices are fabricated by depositing a blend of organic polymer, small organic molecules, and nanoparticles between two metal electrodes. The primary aim is to produce devices that exhibit two distinct electrical conductance states when control voltages are applied. By retaining the states when power is removed can be viewed as the realization of nonvolatile memory. In this letter, an attempt is made to further understand the conundrums that scholars in this field are currently facing, with questions about the nanoparticle charging mechanism being investigated.
    Applied Physics Letters 01/2010; 96(4):043120-043120-3. · 3.79 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Sub-2-nm-size basic ligand Au nanoparticles were chemically synthesized and chemisorbed on an acidic self-assembled monolayer/Au(111) substrate by acid--base interaction. Coulomb blockade behaviors with clear Coulomb gaps were observed in current--voltage (I--V) and log I{--}V curves of the chemisorbed Au nanoparticles by scanning tunneling spectroscopy at room temperature. By fitting the measured I(V) and log I(V) to a Coulomb blockade model, we estimated the charging energy of one electron on the Au nanoparticles to be 10 times greater than the thermal energy kT; the tunneling resistance of the Au core--Au(111) surface was evaluated to be 3.5 GOmega ± 15%.
    Applied Physics Express - APPL PHYS EXPRESS. 01/2010;

Full-text (2 Sources)

View
76 Downloads
Available from
May 22, 2014