Formation and control of Ultrasharp metal/molecule interfaces by controlled immobilization of size-selected metal Nanoclusters onto organic molecular films

Masato Nakaya, Takeshi Iwasa, Hironori Tsunoyama, Toyoaki Eguchi, Atsushi Nakajima

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The formation of metallic layers on ultrathin molecular films via a well-controlled interface is essential for constructing organic nanodevices composed of metal/molecule/metal sandwich junctions. The scanning tunneling microscopy and spectroscopy studies demonstrate that an ultrasharp metal/molecule interface is realizable by depositing size-selected Ag nanoclusters (Agn) from the gas phase on few-layer films of C 60 molecules. It is also demonstrated that Agn nanoclusters can be immobilized on monolayer films of oligothiophene molecules via C60 molecules, although they three-dimensionally aggregate on bare oligothiophene films. It is also shown that electrons and holes are injected into the topmost layer of C60 films via the Ag n/C60 interface. Moreover, the barrier height for carrier injection at the Agn/C60 interface can be modified depending on the size of Agn nanoclusters and the kinetic energy during the deposition. The present results demonstrate that the controlled immobilization of metallic nanoclusters on molecular films can be used as a fabrication technology for metal/molecule/metal junctions. Metal/molecule heterojunctions are constructed by the controlled immobilization of size-selected Ag nanoclusters (Agn) from the gas phase on ultrathin C60 films. In such heterojunctions, electrons and holes can be precisely injected into the topmost C60 molecules in films via an atomically abrupt metal/molecule interface. The barrier height for carrier injection can be modified.

Original languageEnglish
Pages (from-to)1202-1210
Number of pages9
JournalAdvanced Functional Materials
Volume24
Issue number9
DOIs
Publication statusPublished - 2014 Mar 5

Fingerprint

Nanoclusters
nanoclusters
immobilization
Metals
Molecules
metals
molecules
carrier injection
Heterojunctions
heterojunctions
Gases
vapor phases
Electrons
Ultrathin films
Scanning tunneling microscopy
Kinetic energy
scanning tunneling microscopy
Monolayers
electrons
kinetic energy

Keywords

  • fullerene
  • heterojunctions
  • metal nanoclusters
  • STM
  • STS

ASJC Scopus subject areas

  • Biomaterials
  • Electrochemistry
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Formation and control of Ultrasharp metal/molecule interfaces by controlled immobilization of size-selected metal Nanoclusters onto organic molecular films. / Nakaya, Masato; Iwasa, Takeshi; Tsunoyama, Hironori; Eguchi, Toyoaki; Nakajima, Atsushi.

In: Advanced Functional Materials, Vol. 24, No. 9, 05.03.2014, p. 1202-1210.

Research output: Contribution to journalArticle

@article{093fc3a0f25e4cd99701e6cd025eb4fd,
title = "Formation and control of Ultrasharp metal/molecule interfaces by controlled immobilization of size-selected metal Nanoclusters onto organic molecular films",
abstract = "The formation of metallic layers on ultrathin molecular films via a well-controlled interface is essential for constructing organic nanodevices composed of metal/molecule/metal sandwich junctions. The scanning tunneling microscopy and spectroscopy studies demonstrate that an ultrasharp metal/molecule interface is realizable by depositing size-selected Ag nanoclusters (Agn) from the gas phase on few-layer films of C 60 molecules. It is also demonstrated that Agn nanoclusters can be immobilized on monolayer films of oligothiophene molecules via C60 molecules, although they three-dimensionally aggregate on bare oligothiophene films. It is also shown that electrons and holes are injected into the topmost layer of C60 films via the Ag n/C60 interface. Moreover, the barrier height for carrier injection at the Agn/C60 interface can be modified depending on the size of Agn nanoclusters and the kinetic energy during the deposition. The present results demonstrate that the controlled immobilization of metallic nanoclusters on molecular films can be used as a fabrication technology for metal/molecule/metal junctions. Metal/molecule heterojunctions are constructed by the controlled immobilization of size-selected Ag nanoclusters (Agn) from the gas phase on ultrathin C60 films. In such heterojunctions, electrons and holes can be precisely injected into the topmost C60 molecules in films via an atomically abrupt metal/molecule interface. The barrier height for carrier injection can be modified.",
keywords = "fullerene, heterojunctions, metal nanoclusters, STM, STS",
author = "Masato Nakaya and Takeshi Iwasa and Hironori Tsunoyama and Toyoaki Eguchi and Atsushi Nakajima",
year = "2014",
month = "3",
day = "5",
doi = "10.1002/adfm.201302187",
language = "English",
volume = "24",
pages = "1202--1210",
journal = "Advanced Functional Materials",
issn = "1616-301X",
publisher = "Wiley-VCH Verlag",
number = "9",

}

TY - JOUR

T1 - Formation and control of Ultrasharp metal/molecule interfaces by controlled immobilization of size-selected metal Nanoclusters onto organic molecular films

AU - Nakaya, Masato

AU - Iwasa, Takeshi

AU - Tsunoyama, Hironori

AU - Eguchi, Toyoaki

AU - Nakajima, Atsushi

PY - 2014/3/5

Y1 - 2014/3/5

N2 - The formation of metallic layers on ultrathin molecular films via a well-controlled interface is essential for constructing organic nanodevices composed of metal/molecule/metal sandwich junctions. The scanning tunneling microscopy and spectroscopy studies demonstrate that an ultrasharp metal/molecule interface is realizable by depositing size-selected Ag nanoclusters (Agn) from the gas phase on few-layer films of C 60 molecules. It is also demonstrated that Agn nanoclusters can be immobilized on monolayer films of oligothiophene molecules via C60 molecules, although they three-dimensionally aggregate on bare oligothiophene films. It is also shown that electrons and holes are injected into the topmost layer of C60 films via the Ag n/C60 interface. Moreover, the barrier height for carrier injection at the Agn/C60 interface can be modified depending on the size of Agn nanoclusters and the kinetic energy during the deposition. The present results demonstrate that the controlled immobilization of metallic nanoclusters on molecular films can be used as a fabrication technology for metal/molecule/metal junctions. Metal/molecule heterojunctions are constructed by the controlled immobilization of size-selected Ag nanoclusters (Agn) from the gas phase on ultrathin C60 films. In such heterojunctions, electrons and holes can be precisely injected into the topmost C60 molecules in films via an atomically abrupt metal/molecule interface. The barrier height for carrier injection can be modified.

AB - The formation of metallic layers on ultrathin molecular films via a well-controlled interface is essential for constructing organic nanodevices composed of metal/molecule/metal sandwich junctions. The scanning tunneling microscopy and spectroscopy studies demonstrate that an ultrasharp metal/molecule interface is realizable by depositing size-selected Ag nanoclusters (Agn) from the gas phase on few-layer films of C 60 molecules. It is also demonstrated that Agn nanoclusters can be immobilized on monolayer films of oligothiophene molecules via C60 molecules, although they three-dimensionally aggregate on bare oligothiophene films. It is also shown that electrons and holes are injected into the topmost layer of C60 films via the Ag n/C60 interface. Moreover, the barrier height for carrier injection at the Agn/C60 interface can be modified depending on the size of Agn nanoclusters and the kinetic energy during the deposition. The present results demonstrate that the controlled immobilization of metallic nanoclusters on molecular films can be used as a fabrication technology for metal/molecule/metal junctions. Metal/molecule heterojunctions are constructed by the controlled immobilization of size-selected Ag nanoclusters (Agn) from the gas phase on ultrathin C60 films. In such heterojunctions, electrons and holes can be precisely injected into the topmost C60 molecules in films via an atomically abrupt metal/molecule interface. The barrier height for carrier injection can be modified.

KW - fullerene

KW - heterojunctions

KW - metal nanoclusters

KW - STM

KW - STS

UR - http://www.scopus.com/inward/record.url?scp=84897653684&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84897653684&partnerID=8YFLogxK

U2 - 10.1002/adfm.201302187

DO - 10.1002/adfm.201302187

M3 - Article

AN - SCOPUS:84897653684

VL - 24

SP - 1202

EP - 1210

JO - Advanced Functional Materials

JF - Advanced Functional Materials

SN - 1616-301X

IS - 9

ER -