銅酞菁一維奈米結構製備及其性質研究

Preparation and Characterization of 1-D CuPc Nanostructures

王家佑(Chia-Yu Wang)

指導教授 ： 彭宗平

國立清華大學/工學院/材料科學工程學系/碩士(2006年)

https://doi.org/10.6843/NTHU.2006.00472

摘要

近年來，不論是在學界或者是工業應用上，奈米科技已經成為一個很重要的議題。同時，有機材料也被視為極具潛力的多用途材料，所以藉由奈米尺度有機材料的製備，提供了奈米科學一個更具挑戰的研究方向。
　　本研究利用氣相冷凝法製備銅酞菁 (CuPc) 的一維奈米結構，藉由工作氣體壓力及蒸鍍溫度與時間的控制，可以製作出不同形貌及尺寸的奈米結構。此奈米結構形成的機制可用溫度梯度造成的樹枝狀結構來解釋。透過X光繞射可以確定其非晶結構，同時紫外-可見光吸收光譜的藍移可由尺寸效應來說明。示差掃描熱量分析儀顯示市售粉末在533K會有α相到β相的相轉變，但是製備後的CuPc奈米結構在此溫度則沒有明顯的相變。為了研究熱處理對CuPc的影響，也在高真空環境下製成CuPc的薄膜。熱處理會讓CuPc奈米結構及薄膜結構成為一維結構的形貌，同時也會有β相的出現。由於熱處理後分子間分子軌域重疊情況的改變，造成了光能隙的變化。

關鍵字

銅酞菁 ； 氣相冷凝法 ； 有機一維奈米結構 ； 紫外可見光吸收光譜 ； 熱處理 ； 光能隙

並列摘要

Recently, nanotechnology has become a very important issue not only in the academic world but also in industry. In addition, organic materials are considered as a promising field in various applications. Therefore, by forming nanosized organic products, a new direction of nanoscience can be further created.
In this work, 1-D nanostructures of copper phthalocyanine (CuPc) were prepared by vapor condensation. The morphologies and sizes of CuPc nanostructures were controlled by the pressure of the inert gas and the evaporation temperature and time. The growth mechanism of 1-D nanostructures was explained by dendritic growth caused by the temperature gradient. The amorphous phase of CuPc nanostructures was identified by XRD. The blue shift of B-band observed by UV-visible absorption spectra was caused by the size effect. DSC analysis showed that the phase transition temperature from α to β was approximate 533K for commercial powder. As for as-prepared nanostructures, no phase transition occurred at around 533K. In order to study the heat treatment of CuPc, thin film was also prepared by vapor condensation system in a high vacuum condition. 1-D structures were formed after heat treatment on CuPc nanostructures and thin film. Besides, the β phase was formed after annealing. The optical band gap had a red shift as the annealing temperature increased. In other words, the absorption characteristic of CuPc could be changed by the heat treatment.

並列關鍵字

copper phthalocyanine ； 1-D organic nanostructure ； UV-visibke absorption spectrum ； heat treatment ； optical band gap

參考文獻

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