Surface reactions on thin layers of silane coupling agents
- Purdue Univ., West Lafayette, IN (United States)
The reactivity of immobilized functional groups in thin layers of (3-aminopropyl)triethoxysilane (APS), (3-mercaptopropyl)trimethoxysilane, (3-bromopropyl)trimethoxysilane, and (8-bromooctyl)trimethoxysilane on oxidized aluminum substrates was studied with reflection-adsorption infrared spectroscopy (RAIR), optical ellipsometry and contact-angle measurements. Mass changes on the surface associated with the surface-confined reactions were measured with the quartz crystal microbalance (QCM). Single layers of (3-aminopropyl)triethoxysilane on oxidized aluminum react with chlorodimethylsilane to give [(-O)[sub 3]Si(CH[sub 2])[sub 3]NH[sub 2][sup +]SiMe[sub 2]H]Cl[sup [minus]] and single layers of (3-mercaptopropyl)trimethoxysilane on oxidized aluminum react with phenylmercury hydroxide to give [(-O)[sub 3]Si(CH[sub 2])[sub 3]SHgPh], while no substitution reaction of (3-bromopropyl)trimethoxysilane and (8-bromooctyl)trimethoxysilane monolayers occurred with cyanide. Films of APS were further utilized to immobilize pepsin. It is discussed to which extent known reactions from solution can be transferred to interface reactions. 50 refs., 8 figs., 5 tabs.
- OSTI ID:
- 5481480
- Journal Information:
- Langmuir; (United States), Journal Name: Langmuir; (United States) Vol. 9:11; ISSN LANGD5; ISSN 0743-7463
- Country of Publication:
- United States
- Language:
- English
Similar Records
Interaction of silane coupling agents with the TiO{sub 2}(110) surface
Related Subjects
400102 -- Chemical & Spectral Procedures
400201* -- Chemical & Physicochemical Properties
ACID PROTEINASES
ADSORPTION
ALUMINIUM
BALANCES
CHEMICAL REACTIONS
CYANIDES
ELEMENTS
ELLIPSOMETRY
ENZYMES
FILMS
HYDRIDES
HYDROGEN COMPOUNDS
HYDROLASES
INFRARED SPECTRA
MEASURING INSTRUMENTS
MEASURING METHODS
MERCURY COMPOUNDS
METALS
MICROBALANCES
ORGANIC COMPOUNDS
ORGANIC SILICON COMPOUNDS
PEPSIN
PEPTIDE HYDROLASES
PROTEINS
SILANES
SILICON COMPOUNDS
SORPTION
SPECTRA
THIN FILMS
WEIGHT INDICATORS
WETTABILITY