Publication Date:
1998-01-24
Description:
The electromechanical properties of a monomolecular film of poly-gamma-benzyl-L-glutamate (PBLG) 15 nanometers thick grafted at the carboxyl-terminal end to a flat aluminum surface were measured. The field-induced change in film thickness, dominated by a large inverse-piezoelectric effect, demonstrates that the "grafting-from" technique forces the chains into a parallel arrangement. The mechanical plate modulus of the film as determined by electrostriction agrees with the theoretical prediction for a single PBLG molecule along the chain axis. The experiments show that ultrathin polypeptide layers with large persistent polarization can be fabricated by the grafting approach.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jaworek, T -- Neher, D -- Wegner, G -- Wieringa, R H -- Schouten, A J -- New York, N.Y. -- Science. 1998 Jan 2;279(5347):57-60.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max-Planck-Institut fur Polymerforschung, Ackermannweg 10, 55128 Mainz, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9417021" target="_blank"〉PubMed〈/a〉
Keywords:
Aluminum
;
Electrochemistry
;
Electrodes
;
Polyglutamic Acid/*analogs & derivatives/chemistry
;
Polymers
;
*Protein Structure, Secondary
;
Spectrophotometry, Infrared
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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