The utilization of metal nanoparticles (NPs) to fabricate metal electrodes under mild conditions is one of the most studied topic in recent years. In this work, colloidal Au NPs were deposited on two isostructural molecular crystals, namely 1,2,3,4-tetrafluoro-7-thiomethyl-acridine (MeSAcr) and 1,2,3,4-tetrafluoro-7-methoxy-acridine (MeOAcr), exposing S atoms and O atoms, respectively, at their largest crystal faces. The depositions were carried out mainly by drop casting under ambient conditions, increasing the contact time from 1 to 120. min, and the samples were then analyzed by atomic force microscopy (AFM) to evaluate the coverage. Thanks to the affinity between S and Au atoms, Au NPs are observed to adhere on the MeSAcr surface within 1-min contact time, whereas at least 1. h is required to find NPs on the MeOAcr surface. NP adsorption is also affected by the substrate surface morphology; indeed, step edges represent preferential adsorption sites even in the absence of Au-S interaction. Experiments under different conditions were performed to maximize the coverage on MeSAcr, reaching values up to 13%. AFM equipped with fluid cell was also employed to simultaneously depositing and imaging NPs, achieving a better understanding of the adsorption mechanism. © 2011 Elsevier Inc.

Trabattoni, S., Miozzo, L., Moret, M., Campione, M. (2011). Self-assembly of gold nanoparticles on functional organic molecular crystals. JOURNAL OF COLLOID AND INTERFACE SCIENCE, 360(2), 422-429 [10.1016/j.jcis.2011.04.102].

Self-assembly of gold nanoparticles on functional organic molecular crystals

TRABATTONI, SILVIA;MIOZZO, LUCIANO;MORET, MASSIMO;CAMPIONE, MARCELLO
2011

Abstract

The utilization of metal nanoparticles (NPs) to fabricate metal electrodes under mild conditions is one of the most studied topic in recent years. In this work, colloidal Au NPs were deposited on two isostructural molecular crystals, namely 1,2,3,4-tetrafluoro-7-thiomethyl-acridine (MeSAcr) and 1,2,3,4-tetrafluoro-7-methoxy-acridine (MeOAcr), exposing S atoms and O atoms, respectively, at their largest crystal faces. The depositions were carried out mainly by drop casting under ambient conditions, increasing the contact time from 1 to 120. min, and the samples were then analyzed by atomic force microscopy (AFM) to evaluate the coverage. Thanks to the affinity between S and Au atoms, Au NPs are observed to adhere on the MeSAcr surface within 1-min contact time, whereas at least 1. h is required to find NPs on the MeOAcr surface. NP adsorption is also affected by the substrate surface morphology; indeed, step edges represent preferential adsorption sites even in the absence of Au-S interaction. Experiments under different conditions were performed to maximize the coverage on MeSAcr, reaching values up to 13%. AFM equipped with fluid cell was also employed to simultaneously depositing and imaging NPs, achieving a better understanding of the adsorption mechanism. © 2011 Elsevier Inc.
Articolo in rivista - Articolo scientifico
Atomic force microscopy; Fluid cell; Organic crystal; Gold nanoparticle
English
422
429
Trabattoni, S., Miozzo, L., Moret, M., Campione, M. (2011). Self-assembly of gold nanoparticles on functional organic molecular crystals. JOURNAL OF COLLOID AND INTERFACE SCIENCE, 360(2), 422-429 [10.1016/j.jcis.2011.04.102].
Trabattoni, S; Miozzo, L; Moret, M; Campione, M
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/23473
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