DOI: 10.1126/science.267.5196.367. Visualization of Surfactants on Nanostructured Palladium Clusters by a Combination of STM and High-Resolution TEM

Visualization of Surfactants on Nanostructured Palladium Clusters by a Combination of STM and High-Resolution TEM

10.1126/science.267.5196.367

Crossref journal-article

American Association for the Advancement of Science (AAAS)

Science (221)

Abstract

Scanning tunneling microscopy (STM) and high-resolution transmission electron microscopy (TEM) have been used to determine the dimensions of a series of palladium clusters stabilized by tetraalkylammonium salts. Electrochemically prepared colloids were used in which the average diameter of the inner metal core was varied between 2 and 4 nanometers, and the size of the ammonium ions was adjusted in the series + N( n -C 4 H 9 ) 4 < + N( n -C 8 H 17 ) 4 < + N( n -C 18 H 37 ) 4 . The difference between the mean diameter determined by STM and that measured by TEM allows the determination of the thickness of the protective surfactant layer. On the basis of these studies, a model of the geometric properties of ammonium-stabilized palladium clusters has been proposed. Suggestions for the mechanism of the STM imaging process are also made.

Bibliography

Reetz, M. T., Helbig, W., Quaiser, S. A., Stimming, U., Breuer, N., & Vogel, R. (1995). Visualization of Surfactants on Nanostructured Palladium Clusters by a Combination of STM and High-Resolution TEM. Science, 267(5196), 367â369.

Authors 6

Manfred T. Reetz (first)
Wolfgang Helbig (additional)
Stefan A. Quaiser (additional)
Ulrich Stimming (additional)
Norbert Breuer (additional)
Roland Vogel (additional)

References 28 Referenced 313

BESOCKE, K, AN EASILY OPERABLE SCANNING TUNNELING MICROSCOPE, SURFACE SCIENCE 181: 145 (1987). (10.1016/0039-6028(87)90151-8) / SURFACE SCIENCE (1987)
BINNIG, G, TUNNELING THROUGH A CONTROLLABLE VACUUM GAP, APPLIED PHYSICS LETTERS 40: 178 (1982). (10.1063/1.92999) / APPLIED PHYSICS LETTERS (1982)
BONNEMANN, H, ANGEW CHEM 103: 1344 (1991). (10.1002/ange.19911031014) / ANGEW CHEM (1991)
BONNEMANN, H, FORMATION OF COLLOIDAL TRANSITION-METALS IN ORGANIC PHASES AND THEIR APPLICATION IN CATALYSIS, ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH 30: 1312 (1991). (10.1002/anie.199113121) / ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH (1991)
BOUTONNET, M, MONODISPERSED COLLOIDAL METAL PARTICLES FROM NONAQUEOUS SOLUTIONS - CATALYTIC BEHAVIOR FOR THE HYDROGENATION OF BUT-1-ENE OF PLATINUM PARTICLES IN SOLUTION, APPLIED CATALYSIS 20: 163 (1986). (10.1016/0166-9834(86)80013-6) / APPLIED CATALYSIS (1986)
BRADLEY, J.S., SURFACE-CHEMISTRY ON COLLOIDAL METALS - A HIGH-RESOLUTION NUCLEAR-MAGNETIC-RESONANCE STUDY OF CARBON-MONOXIDE ADSORBED ON METALLIC PALLADIUM CRYSTALLITES IN COLLOIDAL SUSPENSION, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 113: 4016 (1991). (10.1021/ja00010a067) / JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (1991)
DAVIS, S.C., UNSUPPORTED SMALL METAL PARTICLES - PREPARATION, REACTIVITY, AND CHARACTERIZATION, CHEMICAL REVIEWS 82: 153 (1982). (10.1021/cr00048a002) / CHEMICAL REVIEWS (1982)
FROMMER, J, ANGEW CHEM 104: 1325 (1992). (10.1002/ange.19921041006) / ANGEW CHEM (1992)
FROMMER, J, SCANNING TUNNELING MICROSCOPY AND ATOMIC FORCE MICROSCOPY IN ORGANIC-CHEMISTRY, ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH 31: 1298 (1992). (10.1002/anie.199212981) / ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH (1992)
Gates B. C. Metal Clusters in Catalysis (1986).
KIWI, J, PROTECTION, SIZE FACTORS, AND REACTION DYNAMICS OF COLLOIDAL REDOX CATALYSTS MEDIATING LIGHT-INDUCED HYDROGEN EVOLUTION FROM WATER, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 101: 7214 (1979). (10.1021/ja00518a015) / JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (1979)
LEWIS, L.N., CHEMICAL CATALYSIS BY COLLOIDS AND CLUSTERS, CHEMICAL REVIEWS 93: 2693 (1993). (10.1021/cr00024a006) / CHEMICAL REVIEWS (1993)
MEGURO, K, THE PREPARATION OF ORGANO COLLOIDAL PRECIOUS METAL PARTICLES, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 61: 341 (1988). (10.1246/bcsj.61.341) / BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN (1988)
REETZ, M.T., SIZE-SELECTIVE SYNTHESIS OF NANOSTRUCTURED TRANSITION-METAL CLUSTERS, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 116: 7401 (1994). (10.1021/ja00095a051) / JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (1994)
SASSON, Y, REVERSIBLE ION-PAIR EXTRACTION IN A BIPHASIC SYSTEM - APPLICATION IN TRANSITION METAL-CATALYZED ISOMERIZATION OF ALLYLIC COMPOUNDS, JOURNAL OF MOLECULAR CATALYSIS 11: 293 (1981). (10.1016/0304-5102(81)87017-4) / JOURNAL OF MOLECULAR CATALYSIS (1981)
SATOH, N, METAL COLLOIDS PRODUCED BY MEANS OF GAS EVAPORATION TECHNIQUE .5. COLLOIDAL DISPERSION OF AU FINE PARTICLES TO HEXANE, POOR DISPERSION MEDIUM FOR METAL SOL, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 62: 1758 (1989). (10.1246/bcsj.62.1758) / BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN (1989)
SCHMID, G, ANGEW CHEM 101: 772 (1989). (10.1002/ange.19891010618) / ANGEW CHEM (1989)
SCHMID, G, PT-309 PHEN-STAR-36 O30+/-10, A 4-SHELL PLATINUM CLUSTER .7., ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH 28: 778 (1989). (10.1002/anie.198907781) / ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH (1989)
SCHMID, G, LARGE CLUSTERS AND COLLOIDS - METALS IN THE EMBRYONIC STATE, CHEMICAL REVIEWS 92: 1709 (1992). (10.1021/cr00016a002) / CHEMICAL REVIEWS (1992)
Schmid G. Clusters and Colloids (1994). (10.1002/9783527616077)
TOSHIMA, N, COLLOIDAL DISPERSIONS OF PLATINUM AND PALLADIUM CLUSTERS EMBEDDED IN THE MICELLES - PREPARATION AND APPLICATION TO THE CATALYSIS FOR HYDROGENATION OF OLEFINS, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 65: 400 (1992). (10.1246/bcsj.65.400) / BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN (1992)
TOSHIMA, N, CHEMISTRY LETTERS: 1245 (1985). / CHEMISTRY LETTERS (1985)
VANDELEEMPUT, LEC, SCANNING TUNNELING MICROSCOPY OBSERVATIONS OF METALLIC CLUSTERS PD-561 AND AU-55 AND THE IMPLICATIONS OF THEIR USE AS A WELL DEFINED TIP, JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B 9: 814 (1991). (10.1116/1.585518) / JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B (1991)
VARGAFTIK, M.N., GIANT PALLADIUM CLUSTERS AS CATALYSTS OF OXIDATIVE REACTIONS OF OLEFINS AND ALCOHOLS, JOURNAL OF MOLECULAR CATALYSIS 53: 315 (1989). (10.1016/0304-5102(89)80066-5) / JOURNAL OF MOLECULAR CATALYSIS (1989)
WELLER, H, ANGEW CHEM 105: 43 (1993). (10.1002/ange.19931050106) / ANGEW CHEM (1993)
WELLER, H, COLLOIDAL SEMICONDUCTOR Q-PARTICLES - CHEMISTRY IN THE TRANSITION REGION BETWEEN SOLID-STATE AND MOLECULES, ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH 32: 41 (1993). (10.1002/anie.199300411) / ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH (1993)
WIERENGA, H.A., DIRECT IMAGING OF PD561(PHEN)38+/-2ON AND AU55(PPH3)12CL6 CLUSTERS USING SCANNING TUNNELING MICROSCOPY, ADVANCED MATERIALS 2: 482 (1990). (10.1002/adma.19900021008) / ADVANCED MATERIALS (1990)
WIESNER, J, PROG COLLOID POLYM S 76: 271 (1988). (10.1007/BFb0114205) / PROG COLLOID POLYM S (1988)

Dates

Type	When
Created	18 years, 10 months ago (Oct. 27, 2006, 2:19 p.m.)
Deposited	1 year, 7 months ago (Jan. 12, 2024, 4:49 p.m.)
Indexed	5 days, 17 hours ago (Aug. 30, 2025, 12:45 p.m.)
Issued	30 years, 7 months ago (Jan. 20, 1995)
Published	30 years, 7 months ago (Jan. 20, 1995)
Published Print	30 years, 7 months ago (Jan. 20, 1995)

Funders 0

None

BibTeX

@article{Reetz_1995, title={Visualization of Surfactants on Nanostructured Palladium Clusters by a Combination of STM and High-Resolution TEM}, volume={267}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.267.5196.367}, DOI={10.1126/science.267.5196.367}, number={5196}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Reetz, Manfred T. and Helbig, Wolfgang and Quaiser, Stefan A. and Stimming, Ulrich and Breuer, Norbert and Vogel, Roland}, year={1995}, month=jan, pages={367–369} }

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