Spontaneous Assembly of Perfectly Ordered Identical-Size Nanocluster Arrays
(Result of the month 04/2002)
STM image of Indium nanoclusters on Si(111) with the VT-STM. Even at an In coverage of ca. 0.05 ML (1 ML = one adsorbed atom per substrate atom), local ordering is already evidenced and all In atoms occupy the faulted half unit cells of the Si(111)-(7x7) surface reconstruction. The image reveals a high uniformity with every cluster exclusively imaged as a hollow-centered, six-spot equilateral triangle.
A method, by which periodic two-dimensional arrays of identical metal clusters of nanometer size and spacing could be spontaneously obtained by taking advantage of surface mediated clustering, is reported. The versatility of the method is demonstrated for a broad range of metals on Si(111)-(7x7) substrates. In-situ scanning tunneling microscopy analysis of In clusters, combined with first-principles total energy calculations, unveils unique initial-stage atomic structures of the surface-supported clusters and the vital steps that lead to the success of this method. A strong interaction between the clusters and the surface holds the key to the observed cluster sizes.


Data courtesy of : Jian-Long Li[1], Jin-Feng Jia[1], Xue-Jin Liang[1], Xi Liu[1], Jun-Zhong Wang[1], Qi-Kun Xue[1], Zhi-Qiang Li[2], John S. Tse[2], Zhenyu Zhang[1,3], and S. B. Zhang [4]
[1] Institut of Physics, Beijing, China;
[2] Steacie Institute for Molecular Sciences, Ottawa, Canada;
[3] Oak Ridge National Laboratory Oak Ridge, USA;
[4] National Renewable Energy Laboratory Golden, USA;

Jian-Long Li[1], Jin-Feng Jia[1], Xue-Jin Liang[1], Xi Liu[1], Jun-Zhong Wang[1], Qi-Kun Xue[1], Zhi-Qiang Li[2], John S. Tse[2], Zhenyu Zhang[1,3], and S. B. Zhang [4] : "Spontaneous Assembly of Perfectly Ordered Identical - Size Nanocluster Arrays" , Phys. Rev. Lett. 88 (6), 2002
[1] State Key Laboratory for Surface Physics and International Center for Quantum Structures, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;
[2] Steacie Institute for Molecular Sciences, National Research Council of Canada, Ottawa, Ontario, K1A 0R6, Canada;
[3] Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6032;
[4] National Renewable Energy Laboratory, Golden, Colorado 80401;

 
This result has been obtained with :
Variable Temperature UHV SPM

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SPM
Precision Large Area Imaging Precision Large Area Imaging
Low temperature MFM Low temperature MFM
Mono-atomic steps on Au(111) Mono-atomic steps on Au(111)
Single domain surface b-SiC(100) Single domain surface b-SiC(100)
Mono-atomic steps on SiO<SUB>2</SUB> Mono-atomic steps on SiO2
Internal structure of C<SUB>60</SUB> at 5K Internal structure of C60 at 5K
Surface State Waves on Ag(111) at T=5K Surface State Waves on Ag(111) at T=5K
New Low Temperature Limit -Atomic Resolution at 2.6K New Low Temperature Limit -Atomic Resolution at 2.6K
Atomically resolved NbSe<SUB>2</SUB> Atomically resolved NbSe2
Buckyball Orientation Buckyball Orientation
STM image of chromium decorated steps of Cu(111) STM image of chromium decorated steps of Cu(111)
Au(111) polycrystalline film Au(111) polycrystalline film
Magnetic domain walls Magnetic domain walls
Writing/Reading on Ferroelectric Materials Writing/Reading on Ferroelectric Materials
Magnetic Nanostructuring Magnetic Nanostructuring
Decanethiol Self-Assembled Monolayers on Au(111) Decanethiol Self-Assembled Monolayers on Au(111)
Atomic resolution on Si(111)7x7 in non-contact mode AFM Atomic resolution on Si(111)7x7 in non-contact mode AFM
Atomic scale resolution Atomic scale resolution
Atomic resolution on Si(111)7x7 in multi-mode AFM Atomic resolution on Si(111)7x7 in multi-mode AFM
MFM Domain Wall Imaging MFM Domain Wall Imaging
icosahedral AlPdMn quasicrystal surface icosahedral AlPdMn quasicrystal surface
Single-molecule reaction and characterization by vibrational excitation Single-molecule reaction and characterization by vibrational excitation
Coronene on Ag(111) Investigated by LEED and STM in UHV Coronene on Ag(111) Investigated by LEED and STM in UHV
Spontaneous Assembly of Perfectly Ordered Identical-Size Nanocluster Arrays Spontaneous Assembly of Perfectly Ordered Identical-Size Nanocluster Arrays
Selfassembled quasi periodic Bi nanostructures Selfassembled quasi periodic Bi nanostructures
Oxygen adsorption on Al(111): low transient mobility Oxygen adsorption on Al(111): low transient mobility
SEM-assisted STM-tip Approach SEM-assisted STM-tip Approach
High performance STM High performance STM
Au single steps Au single steps
High Resolution STM and AFM High Resolution STM and AFM
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Multi-Mode AFM/STM at 1000 K Multi-Mode AFM/STM at 1000 K
Contact Mode AFM at 30 K Contact Mode AFM at 30 K
Observation of dynamic processes Observation of dynamic processes
Non-Contact Mode AFM at 50 K Non-Contact Mode AFM at 50 K
Atomic Resolution on Metals Atomic Resolution on Metals
Atomic resolution on NaCl Atomic resolution on NaCl
Electrostatic Force Microscopy with Needle-Sensor AFM Technique Electrostatic Force Microscopy with Needle-Sensor AFM Technique
(AFM mode): Single and double steps on NaClL (AFM mode): Single and double steps on NaClL
Standing waves of a surface state on Cu(111) Standing waves of a surface state on Cu(111)
Au(111) 1x1 at 50K Au(111) 1x1 at 50K
Atomic Resolution on a Pt<SUB>25</SUB>Rh<SUB>75</SUB>(100) Alloy Atomic Resolution on a Pt25Rh75(100) Alloy
Atomic resolution on Cu(111) Atomic resolution on Cu(111)
Screw Dislocation on Si(111) Screw Dislocation on Si(111)
Application Example: In-situ adsorption of Ag Application Example: In-situ adsorption of Ag
Atomic Resolution on Pt(100) Atomic Resolution on Pt(100)
Si(111) at T = 620 K Si(111) at T = 620 K
Atomic resolution on Si(111) Atomic resolution on Si(111)
Si(100) c(2x4) reconstruction Si(100) c(2x4) reconstruction
Step on Si (100) Step on Si (100)
High Resolution STS at 6K High Resolution STS at 6K
Temperature Variation with the LT STM Temperature Variation with the LT STM
Charge density waves on NbSe<SUB>2</SUB> Charge density waves on NbSe2
Surface State Waves Movie Surface State Waves Movie
Ultra-Low Drift at Low Temperatures Ultra-Low Drift at Low Temperatures
Cross- sectional STM & SEM on GaAs Multilayers Cross- sectional STM & SEM on GaAs Multilayers
The SPA-LEED picture taken at an out-of-phase energy of 128 eV The SPA-LEED picture taken at an out-of-phase energy of 128 eV
Atomic resolution on Au(111) Atomic resolution on Au(111)
Oxidised Sb crystals on HOPG Oxidised Sb crystals on HOPG
Standing waves on Au(111) Standing waves on Au(111)
Spin Polarized Tunneling Induced Luminescence Microcopy (SP-TILM) Spin Polarized Tunneling Induced Luminescence Microcopy (SP-TILM)
Atomic resolution on Nanotubes Atomic resolution on Nanotubes
Constant current STM image of a GaAs (110) surface Constant current STM image of a GaAs (110) surface
In situ High-Temperature STM Studies of Surface Dynamics on Atomically Smooth TiN(001) and TiN(111) In situ High-Temperature STM Studies of Surface Dynamics on Atomically Smooth TiN(001) and TiN(111)
Two-dimensional imaging of electronic wavefunctions in carbon nanotubes Two-dimensional imaging of electronic wavefunctions in carbon nanotubes
Scanning Kelvin Probe Microscopy with VT Beam Deflection AFM Scanning Kelvin Probe Microscopy with VT Beam Deflection AFM
Quantum Confinement between Self-Organized Pt Nanowires on Ge(001) Quantum Confinement between Self-Organized Pt Nanowires on Ge(001)
Manipulation on the atomic scale Manipulation on the atomic scale
Segregation of molecular overlayers with different structures on a metal surface Segregation of molecular overlayers with different structures on a metal surface
Self-organised, one dimensional Pt nanowires on Ge(001) Self-organised, one dimensional Pt nanowires on Ge(001)
Work Function Imaging of Semiconductor Surfaces Using Ultrahigh Vacuum Kelvin Probe Force Microscopy Work Function Imaging of Semiconductor Surfaces Using Ultrahigh Vacuum Kelvin Probe Force Microscopy
Exploring the Mechanism of Molecular Chirality Transfer via STM Exploring the Mechanism of Molecular Chirality Transfer via STM
Scanning Tunneling Spectroscopy on MgB<SUB>2</SUB> at low Temperatures and High Magnetic Fields Scanning Tunneling Spectroscopy on MgB2 at low Temperatures and High Magnetic Fields
Pseudomorphic Growth of a Single Element Quasiperiodic Ultrathin Film on a Quasicrystal Substrate Pseudomorphic Growth of a Single Element Quasiperiodic Ultrathin Film on a Quasicrystal Substrate
Atomically resolved MnSi island grown on a Si(100)-(2 x 1) substrate Atomically resolved MnSi island grown on a Si(100)-(2 x 1) substrate
In-situ Evaporation In-situ Evaporation
Magnetic Force Microscopy Magnetic Force Microscopy
Non-Contact AFM Non-Contact AFM
STM on organics STM on organics
In-situ High Temperature STM Studies of Surface Dynamics 2 In-situ High Temperature STM Studies of Surface Dynamics 2
Phase Transition Phase Transition
Electrostatic Force Microscopy Electrostatic Force Microscopy
Magnetic NOT - Gate (MFM) Magnetic NOT - Gate (MFM)
MFM image taken at a Co/Pt multilayer surface MFM image taken at a Co/Pt multilayer surface
Inelastic Electron Tunneling Spectroscopy on Decanthiol at Elevated Temperatures Inelastic Electron Tunneling Spectroscopy on Decanthiol at Elevated Temperatures
Low Current STM image of a P3DDT film Low Current STM image of a P3DDT film
Adsorption of Acetone at the Ge(100)-2x1 Semiconductor Interface Adsorption of Acetone at the Ge(100)-2x1 Semiconductor Interface
Surface Structure of Icosahedral Al-Cu-Fe quasicrystal Surface Structure of Icosahedral Al-Cu-Fe quasicrystal
Charge writing of nanocrystalline SnO<SUB>2</SUB> surfaces Charge writing of nanocrystalline SnO2 surfaces
Dance around the Maypole Dance around the Maypole
Direct imaging of the atomic structure inside a nanowire by Scanning Tunneling Microscopy Direct imaging of the atomic structure inside a nanowire by Scanning Tunneling Microscopy
Atomic resolved non-contact AFM imaging of Ge/Si(105) surface Atomic resolved non-contact AFM imaging of Ge/Si(105) surface
Highest resolution STM image of Si(111)-7x7 Highest resolution STM image of Si(111)-7x7
Nanoscale gold-fingers Nanoscale gold-fingers
Atomic Resolution Imaging at 500 fA Tunneling Current Atomic Resolution Imaging at 500 fA Tunneling Current
Dynamical oscillation at the α-Sn/Ge(111) surface Dynamical oscillation at the α-Sn/Ge(111) surface
Spin-Polarised Low Temperature STM Spin-Polarised Low Temperature STM
Molecular superstructures of thermally unstable molecules deposited with the spray-Jet technique on Au(111) surface Molecular superstructures of thermally unstable molecules deposited with the spray-Jet technique on Au(111) surface
Chemical Fingerprinting at the Atomic Level Chemical Fingerprinting at the Atomic Level
Highly Resolved STM and Non-Contact AFM on Ag(√3x √3)/Si(111) 7x7 with Omicron VT AFM and Matrix SPM Control System Highly Resolved STM and Non-Contact AFM on Ag(√3x √3)/Si(111) 7x7 with Omicron VT AFM and Matrix SPM Control System
Visualizing and exploring local electronic structure of a quantum point contact with STM Visualizing and exploring local electronic structure of a quantum point contact with STM
Controlling the Kondo effect of an adsorbed magnetic atom by single-molecule chemistry Controlling the Kondo effect of an adsorbed magnetic atom by single-molecule chemistry
Electronic Properties of Self-Organised Poly(3-dodecylthiophene)Monolayers Probe at the Single Chain Scale by Two-Dimensional Scanning Tunneling Spectroscopy Imaging Electronic Properties of Self-Organised Poly(3-dodecylthiophene)Monolayers Probe at the Single Chain Scale by Two-Dimensional Scanning Tunneling Spectroscopy Imaging
Electrical contact melting on nanoscale Electrical contact melting on nanoscale
Formation of Iron Oxide Nanoparticles and Thin Films on Au(111) Formation of Iron Oxide Nanoparticles and Thin Films on Au(111)
Strong Bonding of single C60 molecules to (1x2)-Pt (110): an STM/DFT Investigation Strong Bonding of single C60 molecules to (1x2)-Pt (110): an STM/DFT Investigation
Influence of the Local Adsorption Environment on the Intra-Molecular Contrast of Organic Molecules in Non-Contact Atomic Force Microscopy Influence of the Local Adsorption Environment on the Intra-Molecular Contrast of Organic Molecules in Non-Contact Atomic Force Microscopy
Atom Manipulation at 5 K! Atom Manipulation at 5 K!
Atomic Manipulation at Room Temperature Atomic Manipulation at Room Temperature
Atomic Resolution on MgO (100) at T=5K using qPlus Non-Contact AFM mode Atomic Resolution on MgO (100) at T=5K using qPlus Non-Contact AFM mode
Temperature-dependent self-assemblies of C<SUB>60</SUB> on (1x2)-Pt (110): an STM/DFT Investigation Temperature-dependent self-assemblies of C60 on (1x2)-Pt (110): an STM/DFT Investigation
Molceular Assembly of Rubrene on a Metal/Metal Oxide Nanotemplate Molceular Assembly of Rubrene on a Metal/Metal Oxide Nanotemplate
High-Resolution STM Imaging and Molecular Modeling High-Resolution STM Imaging and Molecular Modeling
Configuration dependent critical nuclei in the self assembly of magic cluster Configuration dependent critical nuclei in the self assembly of magic cluster
C<SUB>60</SUB> / Corannulene on Cu(110) C60 / Corannulene on Cu(110)
Playing Pinball with Atoms Playing Pinball with Atoms
Electric field response of a vibrationally excited molecule in an STM junction Electric field response of a vibrationally excited molecule in an STM junction
Morphological work function dependence of rare-earth disilicide metal nanostructures Morphological work function dependence of rare-earth disilicide metal nanostructures
Beam Deflection AFM with QPlus AFMCustomized Beam Deflection AFM with QPlus AFMCustomized
Mapping the Electronic Surface Potential of Nanostructured Surfaces Mapping the Electronic Surface Potential of Nanostructured Surfaces
Contrast inversion in non-contact atomic force microscopy imaging of C60 molecules Contrast inversion in non-contact atomic force microscopy imaging of C60 molecules
qPlus atomic force microscopy of the Si(100) surface: <br>Buckled, split-off, and added dimers qPlus atomic force microscopy of the Si(100) surface:
Buckled, split-off, and added dimers
Constructing an Array of Anchored Single-Molecule Rotors on Gold Surfaces Constructing an Array of Anchored Single-Molecule Rotors on Gold Surfaces
Structure investigation of the (100) surface of the orthorhombic Al<sub>13</sub>Co<sub>4</sub> crystal Structure investigation of the (100) surface of the orthorhombic Al13Co4 crystal
New structural model for the Si(331)-(12x1) surface reconstruction New structural model for the Si(331)-(12x1) surface reconstruction
Atomic resolution on the Si (5 5 12) surface Atomic resolution on the Si (5 5 12) surface
Transport through a Single Octanethiol Molecule Transport through a Single Octanethiol Molecule
Dendritic to non-dendritic transitions in Au islands Dendritic to non-dendritic transitions in Au islands
QPlus Technology for Atomic-Resolution AFM on NaCl at 5K QPlus Technology for Atomic-Resolution AFM on NaCl at 5K
Ultimate Nanoprobe Ultimate Nanoprobe
STM Performance on Gold at Low Temperatures STM Performance on Gold at Low Temperatures
4 Probe measurements on 4 Probe measurements on "lifted" nanowires
Low current STM Low current STM
4 Probe with SEM Navigation 4 Probe with SEM Navigation
STM constant height image a reconstructed Si(111)7x7 surface STM constant height image a reconstructed Si(111)7x7 surface
Thermal and Mechanical Actuation of Single-Molecule Rotors Thermal and Mechanical Actuation of Single-Molecule Rotors
Stable room temperature molecular assembly of zwitterionic organic dipoles guided by Si(111)-7x7 template effect ** Stable room temperature molecular assembly of zwitterionic organic dipoles guided by Si(111)-7x7 template effect **