文章信息/Info

Title:

Regulating the Properties of Gel-Single Crystal Composites by the Incorporation of Gel Networks

作者:

劉育京; 李寒瑩

浙江大學高分子科學與工程學系, 高分子合成與功能構造教育部重點實驗室

Author(s):

LIU Yujing;  LI Hanying

Department of Polymer Science and Engineering, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Zhejiang University

關鍵詞:

生物礦化; 凝膠-單晶復合物; 凝膠網絡; 形貌; 力學性能; 禁帶寬度; 功能化

Keywords:

biomineralization;  gel-single crystal composites;  gel networks;  morphology;  mechanical property;  band gap;  functionalization

DOI:

10.7502/j.issn.1674-3962.2018.08.07

文獻標志碼:

A

摘要:

自然界中，生物礦物單晶在結晶過程中可以吸收大量的生物大分子，從而形成力學增強的單晶復合物。與生物礦化現象相類似, 在凝膠介質中生長的單晶被證明能在結晶過程中吸收周圍的凝膠網絡, 從而形成兩相三維互穿的凝膠網絡-單晶復合物。在單晶基質中嵌入凝膠網絡可以改變晶體生長習性從而調控其形貌，并且可以提高或調控晶體本征性質。同時，凝膠網絡也可以作為載體使多種功能性納米材料嵌入單晶，從而賦予單晶非本征的性質，這些發現都為拓展單晶未來潛在應用提供了重要參考。本文綜述了通過凝膠網絡嵌入以調控單晶性質和功能化單晶的研究進展，從凝膠網絡嵌入影響晶體形貌、提升單晶力學性質、調控半導體單晶禁帶寬度和引入功能納米材料功能化單晶等四個方面進行了介紹和討論，并對今后的研究方向和應用前景進行了展望。

Abstract:

In nature, biogenic crystalline materials often incorporate surrounding biomacromolecules during crystallization, forming mechanically strengthened single crystal composites. Similarly, single-crystals grown from gel media can incorporate gel-networks, leading to a three-dimensional interpenetration structure without disrupting the long-range ordering. By virtue of the incorporation of gel networks, the habits of single crystal are changed and the intrinsic properties of the single crystal are improved. Moreover, functional nanomaterials can be introduced into single-crystals accompanied with the incorporation of gel-networks, endowing the crystalline host with non-intrinsic properties. As such, the incorporation of gel networks may expand the potential applications of the single crystal host. In this paper, we discuss the recent progress of regulating single crystal properties or functionalizing single-crystals by the incorporation of gel-networks, including the revolution of crystal morphologies, enhanced mechanical properties, regulation of semiconductor band gap and the functionalization of single crystals. Finally, the potential application of the gel-single crystal composite is predicted.