電泳自組裝方法製備聚苯乙烯微球之反蛋白石結構光子晶體

Preparation of Inverse Opal Structured Photonic Crystals with 3-D Ordered Template of Polystyrene Microsphere by Electrophoretic Self-Assembly

陳永星(Stanley Chen) ； 張忠傑(Chung-Chieh Chang) ； 詹志潔(Chih-Chieh Chan) ； 駱榮富(Rong-Fuh Louh)

《真空科技》 19卷4期 (2007/04) Pp. 25-29

https://doi.org/10.29808/JVSROC.200704.0004

摘要

電泳自組裝(EPSA)技術優於一般常用之重力沉降法，能夠快速且簡易地將單一分散且窄粒徑分布之聚苯乙烯(PS)微球(50-500nm)有效地排列成三維週期性結構。此3-D有序結構將可應用於製作新穎的光子晶體模板，以利吾人開發前瞻性高頻通信元件，具有調制處理電磁波信號的用途。吾人以無乳化聚合法合成PS微球，並將PS微球之水系溶液混合乙醇溶劑製備EPSA膠體溶液。添加適量的表面改質劑如十二烷基硫酸鈉(SDS)與微量之硝酸或氨水，以精確地調控EPSA膠體顆粒之表面列塔電位。乾燥之電泳自組裝PS微球模板經UV-Vis光譜儀測量，證實了試片具有帶通濾波器作用。吾人亦嘗試將純金屬(Pt, Ti)以濺鍍法滲透填充(infiltration)於電泳自組裝PS微球模板中之間隙，再藉由煆燒熱分解方式以移除試片之有機物質，最後獲得具有反蛋白石結構之光子晶體。

關鍵字

電泳自組裝 ； 重力沈降法 ； 聚苯乙烯 ； 光子晶體 ； 界面活性劑 ； 反蛋白石結構

並列摘要

Monodispersed colloid of polystyrene (PS) microspheres of 50-500 nm can be formed as 3-D structure in periodic patterns by electrophoretic self-assembly (EPSA) method for much less processing time (only from several seconds to few minutes), as compared to the conventional time-consuming way such as the gravity sedimentation. The 3-D ordered structure has a great technical potential used as templates to fabricate the photonic crystals for the transmission of electromagnetic signals in telecommunication applications. The aqueous solution of PS microspheres was mixed with ethanol solvent to prepare the EPSA colloid. The EPSA colloid stability was obtained by means of adding modest amount of surfactant of sodium dodecyl sulfate (SDS) and chemical agent such as nitric acid and ammonium hydroxide to adjust the zeta potential of PS spheres. The dried PS template was filled up with the metallic material (Pt, Ti) by sputtering process and was subsequently pyrolyzed to remove the organic substance to achieve the inverse opal structure.

並列關鍵字

electrophoretic self-assembly ； polystyrene ； photonic crystals ； surfactant ； 3-D ordered structure ； templates ； inverse opal structure ； electrophoretic deposition