Properties of core-shell structured nanopowders of molecular crystals fabricated by dry grinding

被引：10

作者：

Ichimura, Kunihiro ^{[1
,2
]}

Aoki, Ken'ichi ^{[1
,2
]}

Akiyama, Haruhisa ^{[3
]}

Horiuchi, Shin ^{[3
]}

Nagano, Shusaku ^{[4
]}

Horie, Shinji ^{[5
]}

机构：

[1] Toho Univ, Fac Sci, Chiba 2748510, Japan

[2] Toho Univ, Res Ctr Mat Integrated Properties, Chiba 2748510, Japan

[3] Natl Inst Adv Ind Sci & Technol, Nanotechnol Res Inst, Tsukuba, Ibaraki 3058565, Japan

[4] Nagoya Univ, Grad Sch Engn, Dept Mol Design & Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan

[5] Toda Kogyo Corp, R&D Ctr, Hiroshima 7390652, Japan

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2010年 / 20卷 / 21期

关键词：

MELTING BEHAVIOR; SOLUBLE DRUGS; NANOCRYSTALS; CRYSTALLIZATION; ANTHRACENE; ENERGY; BIOAVAILABILITY; NANOPARTICLES; IMPROVEMENT; ADSORPTION;

D O I：

10.1039/b925120k

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A generic way to prepare nano-sized molecular crystals in large scale is described. The dry mechanical grinding of a mixture of molecular crystals with surface-modified Stober silica nanoparticles gave voluminous hybridised powders with core-shell nanostructures, which were revealed by TEM and EFTEM measurements. Fluorescence spectra of the hybrids of emissive crystals suggested that crystal structures of the bulk are preserved even after the milling. Calorimetric measurements disclosed that melting points of crystals are lowered as a result of the nanohybridisation and that the depression of melting point and heat of fusion are reversibly proportional to shell thickness.

引用

页码：4312 / 4320

页数：9

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