High- T _c Superconductors in the Two-Dimensional Limit: [(Py-C _n H _{2 n +1} ) ₂ HgI ₄ ]-Bi ₂ Sr ₂ Ca _m

Abstract

The free modulation of interlayer distance in a layered high-transition temperature (high-Tc) superconductor is of crucial importance not only for the study of the superconducting mechanism but also for the practical application of high-Tc superconducting materials. Two-dimensional (2D) superconductors were achieved by intercalating a long-chain organic compound into bismuth-based high-Tc cuprates. Although the intercalation of the organic chain increased the interlayer distance remarkably, to tens of angstroms, the superconducting transition temperature of the intercalate was nearly the same as that of the pristine material, suggesting the 2D nature of the high-Tc superconductivity.

Intercalative Route to Heterostructured Nanohybirds

“…There are no DNA bands beyond pH _-3, indicating that the DNA molecules in hybrid system are quite stable even in weak acidic atmosphere. However, the DNA bands appeared when the hybrids are treated in a strong acidic media below pH = 2. since the hydroxide layers are dissolved in such acidic condition (lane [1][2][3][4][5][6][7][8][9][10]. From the DNA clution as shown in lane II and 12, it can be deduced that the DNA-LDH hybrid can protect DNA from DNase I enzyme.…”

“…Each solvent-containing mixture was reacted in a closed ampoule at 40 TC for 6 hours and washed with a solvent blend of acetone and diethylether (1:1 volumetric ratio) to remove the excess reactant of Py-C,,H 2 .+u. And finally the resulting products were dried in vacuum [2]. The superconducting colloidal suspension could be obtained by sonicating the organic-salt intercalates in acetone solvent [4], which was then deposited on a film by electrophoretic deposition(EPD) technique and subsequent heating.…”

“…The composition can be generally represented as [M The unique anion exchange capability of LDHs meets the first requirement as inorganic matrices for encapsulating functional biomolecules with negative charge in aqueous media. In this study, we present that the high-T, superconducting intercalate with its remarkable lattice expansion can be applied as a precursor for superconducting colloids when dispersed in an appropriate solvent [2], also that biomolecules, such as DNA, ATP and antisenses etc. can be incorporated between hydroxide layers by a simple ion-exchange reaction to form bio-LDH nanohybrids.…”

“…Recently, inorganic/inorganic [l], organic/inorganic [2], and bio-inorganic [3] heterostructured nanohybrids have attracted considerable research interests, due to their unusual physicochemical properties, which cannot be achieved by conventional solid state reactions. In order to develop new hybrid materials, various synthetic approaches, such as vacuum deposition, LangmuirBlodgett technique, self-assembly, and intercalation method have been explored.…”

The impact of phase state of guest histidine on properties and practical applications of nanohybrids on InSe and GaSe basis

“…and associated with it need to start creating highly capacitive electricity accumulators, the attention of scientists is drawn to the formation of heterostructured nonorganic-, organic-and bio-nanocomposite materials. The latter ones are believed to have unique physical and chemical properties [1,2].…”