Langmuir−Blodgett Films of Carboxylic Acid Derivatized Silver Colloidal Particles: Role of Subphase pH on Degree of Cluster Incorporation

Autor:	Vijaya Patil, Murali Sastry, K. S. Mayya, D. V. Paranjape, S.G. Hegde
Rok vydání:	1997
Předmět:	Langmuir Absorption spectroscopy Chemistry Bilayer technology industry and agriculture Analytical chemistry Quartz crystal microbalance Langmuir–Blodgett film Surfaces Coatings and Films Contact angle Adsorption Chemical engineering Monolayer Materials Chemistry Physical and Theoretical Chemistry
Zdroj:	Scopus-Elsevier
ISSN:	1520-5207 1520-6106
DOI:	10.1021/jp964087f
Popis:	In this paper, we demonstrate that reasonably ordered multilayer films of silver clusters can be deposited by the Langmuir−Blodgett (LB) technique. The approach consists of electrostatically immobilizing negatively charged carboxylic acid derivatized silver colloidal particles at the air−water interface using positively charged fatty amine Langmuir monolayers. The degree of cluster incorporation into the Langmuir monolayer has been controlled by varying the charge on the amine molecules through the colloidal subphase pH. Pressure−area isotherms were used to follow adsorption of the silver colloidal particles at the amine surface, while quartz crystal microgravimetry (QCM), optical absorption spectroscopy, infrared spectroscopy, contact angle measurements, and optical interferometry were used to characterize the multilayer LB films. The films were found to grow in the classical Y-type mode. Optical interferometry indicated a bilayer thickness of 106 A, which yields a cluster size of ∼55 A, in reasonable ag...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e12c3be249b9fafe07b759650f0e1275 https://doi.org/10.1021/jp964087f Zobrazit plný text záznamu