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Surface-initiated polymerization of superhydrophobic polymethylene
We report a new surface-initiated polymerization strategy that yields superhydrophobic polymethylene (PM) films from initially smooth substrates of gold and silicon. The films are prepared by assembling a vinyl-terminated self-assembled monolayer, followed by exposure of the surface to a 0.1 M solution of borane, and polymerizing from the borane sites upon exposure to a solution of diazomethane at -17 degrees C. Surface-initiated polymethylenation (SIPM) presents rapid growth in relation to other surface-initiated reactions, producing PM films thicker than 500 nm after 2 min of reaction and 3 mu m after 24 h of reaction. AFM and SEM images show the presence of micro- and nanoscale features that enable the entrapment of air when exposed to water. Consistent with this result, these films exhibit advancing water contact angles greater than 160 degrees, dramatically different than 103 degrees measured for smooth PM films, and hysteresis values ranging from 2 degrees to 40 degrees depending on the substrate and polymerization time. The superhydrophobic character of the films results in the entrapment of air at the polymer/solution interface to provide remarkable resistances greater than 10(10) Omega.cm(2) against the transport of aqueous redox probes and cause the film to behave as a "perfect" capacitor.
Author(s): Tuberquia, JC (Tuberquia, Juan C.); Nizamidin, N (Nizamidin, Nabijan); Harl, RR (Harl, Robert R.); Albert, J (Albert, Jake); Hunter, J (Hunter, Jason); Rogers, BR (Rogers, Bridget R.); Jennings, GK (Jennings, G. Kane)
Source: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 132 (16): 5725-5734 APR 28 2010
Language: English
Document Type: Article
KeyWords Plus: SELF-ASSEMBLED MONOLAYERS; TRANSFER RADICAL POLYMERIZATION; SUPER-HYDROPHOBIC SURFACES; GOLD SURFACES; POLY(HYDROXYETHYL METHACRYLATE); SILICON SURFACES; COPOLYMER FILMS; BORON COMPOUNDS; ROUGH SURFACES; SIDE-CHAINS
Addresses: [Tuberquia, Juan C.; Nizamidin, Nabijan; Harl, Robert R.; Albert, Jake; Hunter, Jason; Rogers, Bridget R.; Jennings, G. Kane] Vanderbilt Univ, Dept Chem & Biomol Engn, Nashville, TN 37235 USA
Reprint Address: Jennings, GK, Vanderbilt Univ, Dept Chem & Biomol Engn, 221 Kirkland Hall, Nashville, TN 37235 USA.
Funding Agency: National Science Foundation - Vanderbilt University School of Engineering Summer Undergraduate Research Experience Program
Publisher: AMER CHEMICAL SOC
Publisher Address: 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
ISSN: 0002-7863
29-char Source Abbrev.: J AM CHEM SOC
ISO Source Abbrev.: J. Am. Chem. Soc.
Subject Category: Chemistry, Multidisciplinary
ISI Document Delivery No.: 587KS
Author(s): Tuberquia, JC (Tuberquia, Juan C.); Nizamidin, N (Nizamidin, Nabijan); Harl, RR (Harl, Robert R.); Albert, J (Albert, Jake); Hunter, J (Hunter, Jason); Rogers, BR (Rogers, Bridget R.); Jennings, GK (Jennings, G. Kane)
Source: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 132 (16): 5725-5734 APR 28 2010
Language: English
Document Type: Article
KeyWords Plus: SELF-ASSEMBLED MONOLAYERS; TRANSFER RADICAL POLYMERIZATION; SUPER-HYDROPHOBIC SURFACES; GOLD SURFACES; POLY(HYDROXYETHYL METHACRYLATE); SILICON SURFACES; COPOLYMER FILMS; BORON COMPOUNDS; ROUGH SURFACES; SIDE-CHAINS
Addresses: [Tuberquia, Juan C.; Nizamidin, Nabijan; Harl, Robert R.; Albert, Jake; Hunter, Jason; Rogers, Bridget R.; Jennings, G. Kane] Vanderbilt Univ, Dept Chem & Biomol Engn, Nashville, TN 37235 USA
Reprint Address: Jennings, GK, Vanderbilt Univ, Dept Chem & Biomol Engn, 221 Kirkland Hall, Nashville, TN 37235 USA.
Funding Agency: National Science Foundation - Vanderbilt University School of Engineering Summer Undergraduate Research Experience Program
Publisher: AMER CHEMICAL SOC
Publisher Address: 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
ISSN: 0002-7863
29-char Source Abbrev.: J AM CHEM SOC
ISO Source Abbrev.: J. Am. Chem. Soc.
Subject Category: Chemistry, Multidisciplinary
ISI Document Delivery No.: 587KS
