Controlled assembly and single electron charging of monolayer protected Au 144 clusters: an electrochemistry and scanning tunneling spectroscopy study

Single gold particles may serve as room temperature single electron memory units because of their size dependent electronic level spacing. Here, we present a proof-of-concept study by electrochemically controlled scanning probe experiments performed on tailor-made Au particles of narrow dispersity. In particular, the charge transport characteristics through chemically synthesized hexane-1-thiol and 4-pyridylbenzene-1-thiol mixed monolayer protected Au144 clusters (MPCs) by differential pulse voltammetry (DPV) and electrochemical scanning tunneling spectroscopy (EC-STS) are reported. The pyridyl groups exposed by the Au-MPCs enable their immobilization on Pt(111) substrates. By varying the humidity during their deposition, samples coated by stacks of compact monolayers of Au-MPCs or decorated with individual, laterally separated Au-MPCs are obtained. DPV experiments with stacked monolayers of Au144-MPCs and EC-STS experiments with laterally separated individual Au144-MPCs are performed both in aqueous and ionic liquid electrolytes. Lower capacitance values were observed for individual clusters compared to ensemble clusters. This trend remains the same irrespective of the composition of the electrolyte surrounding the Au144-MPC. However, the resolution of the energy level spacing of the single clusters is strongly affected by the proximity of neighboring particles.

Ms. hebr. oct. 144 - [Sammelband in 5 Teilen: Handschriftenkonvolut]

Vorbesitzer: Eljāqīm Carmoly; Abraham Merzbacher

Ms. Barth. 144 - Directorium missae Moguntinum

Vorbesitzer: Johannes Philippus Steinbrückner; Bartholomaeusstift Frankfurt am Main

Na 1 Nachlass Max Horkheimer, 293 - Korrespondenzen u.a. mit Jürgen Habermas (p. V 83, 144-253)

1 Brief von Eugen Ripp an Max Horkheimer, 1952; 24 Briefe zwischen Professor Jürgen Habermas und Max Horkheimer, 1960-1971; 3 Briefe zwischen Notar Häfele und Max Horkheimer, 1950; 7 Briefe zwischen Professor Georg W. F. Hallgarten und Max Horkheimer, 1959; 35 Briefe zwischen Professor Walter Hallstein und Max Horkheimer, 1946-1967; 8 Briefe zwischen der Staatssekretärin Hildegard Hamm-Brücher und Max Horkheimer, 1968-1969;

Na 50 Nachlass Arthur Schopenhauer - 'Schopenhauer-Archiv', 144 - Mitteilung über die Nichtaufnahme der Werke Schopenhauers in die Bestände der Stadtbibliothek Wiesbaden

u.a.: Philosophische Bibliothek Herborn; Universität Herborn; Bibliothek Mainz; Portrait Schopenhauers; akademische Lehrfreiheit in der Schweiz; Anerkennung Schopenhauers in Frankfurt;

Ms. Praed. 144 - Sermones de sanctis

Vorbesitzer: Dominikanerkloster Frankfurt am Main

Ms.Ff.F.Stoltze 3. 144 - Brief von E. Huhn an Marianne Venator

Maria Stoltze: Gesuch an den Großherzog wegen Stoltzes Pressprozess

Na 1 Nachlass Max Horkheimer, 677 - Forschungsprojekte über Antisemitismus, Vorurteil, Autorität: Einzeluntersuchungen (p. IX 144-IX 145)

Excerpts of Radio Talks by G. Allison Phelps, Radio Station KMTR; Institute of Social Research: An American Disciple of Adolf Hitler. A Study of the Nazi Propaganda Methods Used by Joseph E. McWilliams of the American Destiny Party in 1940 Election Campaign;