geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Greatly increased toughness of infiltrated spider silk


, : Greatly increased toughness of infiltrated spider silk. Science 324(5926): 488-492

In nature, tiny amounts of inorganic impurities, such as metals, are incorporated in the protein structures of some biomaterials and lead to unusual mechanical properties of those materials. A desire to produce these biomimicking new materials has stimulated materials scientists, and diverse approaches have been attempted. In contrast, research to improve the mechanical properties of biomaterials themselves by direct metal incorporation into inner protein structures has rarely been tried because of the difficulty of developing a method that can infiltrate metals into biomaterials, resulting in a metal-incorporated protein matrix. We demonstrated that metals can be intentionally infiltrated into inner protein structures of biomaterials through multiple pulsed vapor-phase infiltration performed with equipment conventionally used for atomic layer deposition (ALD). We infiltrated zinc (Zn), titanium (Ti), or aluminum (Al), combined with water from corresponding ALD precursors, into spider dragline silks and observed greatly improved toughness of the resulting silks. The presence of the infiltrated metals such as Al or Ti was verified by energy-dispersive x-ray (EDX) and nuclear magnetic resonance spectra measured inside the treated silks. This result of enhanced toughness of spider silk could potentially serve as a model for a more general approach to enhance the strength and toughness of other biomaterials.

US$19.90

PMID: 19390040

DOI: 10.1126/science.1168162


Other references

Martínez-Menéndez, B.; Pérez Sempere, A.; Simón, R.; Mateos, F., 1992: Cerebral venous thrombosis as a cause of neonatal focal clonic seizures. Journal of Neurology 239(5): 294-294

Johnston, C.E., 1998: All pedicle screws at the caudal end of the construct should be protected by a supplemental laminar hook. Spine 23(1): 144-145

Lee, J-Yong.; Yu, J.; Henderson, D.; Langridge, W.H.R., 2004: Plant-synthesized E. coli CFA/I fimbrial protein protects Caco-2 cells from bacterial attachment. A DNA fragment encoding the cholera toxin A2 subunit (CTA2) linked to the enterotoxigenic Escherichia coli (ETEC) colony forming fimbrial antigen CFA/1 was inserted into a plant expression vector containing the cholera toxin B subunit (CTB) fused...

Donaldson, C., 2009: The rise and fall of trans fat: is the battle won?. Perspectives in Public Health 129(2): 56-57

Chiumello, D.; Froio, S.; Bouhemad, Bïd.; Camporota, L.; Coppola, S., 2015: Clinical review: Lung imaging in acute respiratory distress syndrome patients--an update. Over the past 30 years lung imaging has greatly contributed to the current understanding of the pathophysiology and the management of acute respiratory distress syndrome (ARDS). In the past few years, in addition to chest X-ray and lung computed t...

Kritchevsky, David, 1993: Colorectal cancer: The role of dietary fat and caloric restriction. Studies of the relationship between dietary fat intake and colon-cancer risk are generally inconsistent. Animal studies show that caloric (energy) restriction will inhibit the growth of spontaneous or experimentally induced tumors. Exercise reduce...

Burkinshaw J.H.; O.Brien D.; Pendower J.E.H., 1967: Cushings syndrome associated with an neopl islet cell tumor of the pancreas in a boy aged 2 years. Archives of Disease in Childhood 42(225): 525-531

Angelov, K., 1987: Effect of presowing seed irradiated with helium-neon laser on some morphological characters of maize. Effects of seed irradiation with helium-neon laser rays at 20-160 MW on plant height, stem thickness, height of ear emergence on plant; number and area of leaves of 4 maize hybrids were studied. A stimulation effect of the irradiation on morpholog...

Lorenz, E., 1936: Effect of vitamin A on thrombocytes. Administration of vitamin A, as voganol in doses of from 5 to 30 drops daily, influenced the thrombocyte count in the blood of children so that initial high values fell and low values rose. When administration was stopped the counts reverted to th...

Holmgren J., 1973: Detection of albumin immuno globulin g complexes in gamma globulin preparations. Peeters, H. Protides Of The Biological Fluids. Proceedings Of A Colloquia. Vol. 20. Brugge, Belgium, . Xvi 611p. Illus. Pergamon Press: Oxford, England; New York, N.y., U.s.a. 595-601