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

Metallic state in a lime-alumina compound with nanoporous structure


, : Metallic state in a lime-alumina compound with nanoporous structure. Nano Letters 7(5): 1138-1143

We report a metallic state in a nanostructured porous crystal 12CaO x 7Al2O3 by incorporating electrons in the inherent subnanometer-sized cages, in which a three-dimensionally closely packed cage structure acts as an electronic conduction path. High-density electron doping ( approximately 2 x 10(21) cm(-3)), which was achieved by a thermal treatment in Ti metal vapor at approximately 1100 degrees C, induces homogenization of the cage geometry to a symmetric state, resulting in an insulator-metal transition with a sharp enhancement of the electron drift mobility from approximately 0.1 to 4 cm(2) V(-1) s(-1). The results provide an approach for the realization of electroactive functions in materials composed only of environmentally benign elements by utilizing the appropriate nanostructures.

US$19.90

PMID: 17375961

DOI: 10.1021/nl062717b


Other references

Timmermans, J.P., 2001: Interstitial cells of Cajal: is their role in gastrointestinal function in view of therapeutic perspectives underestimated or exaggerated?. This manuscript reviews the current views on morphology and function of the distinct subpopulations of interstitial cells of Cajal (ICC) in the digestive tract and their interrelationships with surrounding cells. Three different functions have bee...

Hammerschmidt, D.E., 2003: Bovine tuberculosis: still a world health problem. Journal of Laboratory and Clinical Medicine 141(5): 359-360

Tenk, C.M.; Kavaliers, M.; Ossenkopp, K., 2003: Acute corticosterone attentuates lithium chloride - induced conditioned place aversions in rats. Acute administration of corticosterone (CORT) facilitates learning in a number of associative paradigms. One of these paradigms is gustatory conditioning where acute CORT potentiates lithium chloride(LiCl)-induced conditioned taste aversion learni...

Nesmeianova, G.; Smirnova, E., 1978: Effect of agricultural development of land on erosion processes in the forest zone of the European part of the USSR. Eroziia pochv i ruslovye protsessy: ) 26-31

Issartel, V.; Spehner, V.; Coudert, P.; Seilles, E.; Couquelet, J., 1998: Synthesis of new pyrrolo[1,2-d][1,2,4]triazines and thiazolo[3,4-d][1,2,4]triazines as immunostimulating agents. Four pyrrolo[1,2-d][1,2,4]triazines and four thiazolo[3,4-d][1,2,4]triazines were synthesized from trans-4-hydroxy-L-proline and L-thiaproline, respectively. The synthetic route involved formation of hydrazides followed by cyclization with orthoes...

Sabelli, H.C.; Giardina, W.J., 1972: Tranquilizing and electrophysiological effects of nicotine. Biological Psychiatry 4(2): 105-130

Dent, A.; Toltzis, P., 2003: Descriptive and molecular epidemiology of Gram-negative bacilli infections in the neonatal intensive care unit. The critically ill neonate is particularly prone to life threatening bacterial infections compared with other patient populations. Current patterns of neonatal sepsis caused by Gram-negative bacilli are reviewed to enable the clinician to better a...

Kececi Savan, D.; Cengiz, M.; Yavuzer, H.; Yavuzer, S.; Sulu, C.; Doventas, A.; Beger, T., 2015: Relation of ambulatory blood pressure measurement and cognitive functions in hypertensive elderly patients. Hypertension is an important risk factor for dementia as much as the morbidity and mortality of cardiovascular disease. Sustained hypertension is also more related to that risk. The aim of the study was to determine the relationship between 24-h a...

Bokor, A.; Csicsek, A.; Hecker, W.; Stefler, J.; Petrovics, E., 2003: Inducing earlier cycling of mares using artificial light programme (a review). Mares are seasonally polyoestrus, that is, they have multiple heat cycles during certain seasons of the year. Most mares do not cycle during the shorter days of fall, winter and early spring. Mares enter their ovulatory cycle in the spring in resp...

Goto, M.; Akimoto, K.; Aoki, K.; Shindo, M.; Koga, K., 2000: Rate enhancement with high ratio of the monoalkylated product to the dialkylated product in the alkylation of the lithium enolate of 1-tetralone with reactive alkyl halides. The reactions of the lithium enolate of 1-tetralone with reactive alkyl halides were examined in the absence and in the presence of 3 eq of various ligands for the lithium. It is shown that the rates of the reactions are enhanced greatly in the pr...