在本研究中，以氣/液界面上的Langmuir單分子層為模板，結合液相中的金屬前驅物離子後，利用Langmuir-Blodgett (LB)沉積技術將單分子層模板/金屬前驅物離子之複合物轉移到雲母基板上，再藉由UV光照射，以光還原法在LB薄膜中形成金屬奈米粒子結構。氣/液界面上之Langmuir單分子層模板的特性，是根據威氏平板(Wilhelmy plate)法所得到的表面壓-面積等溫線進行探討，並以布魯斯特角顯微鏡(Brewster angle microscope, BAM)觀察單分子層模板的形態。經UV光照射後在模板/金屬前驅物離子之LB薄膜中的金屬奈米粒子形成行為，則使用穿透式電子顯微鏡和原子力顯微鏡進行偵測。
實驗結果顯示，液相中的金屬前驅物離子結合到Langmuir單分子層模板上，會造成單分子層之表面壓-面積等溫線的偏移及形態的改變。藉由控制單分子層模板的組成，能夠調控模板的電荷密度及結合之前驅物離子的量，進而改善LB膜的沉積品質。Langmuir單分子層模板結合液相中的金屬前驅物離子所形成之LB膜經過光還原反應，則可在LB膜中形成金屬奈米粒子結構。原子力顯微鏡的分析顯示，經過UV光照射後，在吸附容量越高之單分子層模板所形成的LB膜中，能生成越密集的奈米粒子。此外，在不同單分子層模板的LB膜中，可製備出不同形態的金屬奈米粒子結構。這些結果顯示，使用此模板合成方法，配合LB沉積技術，是一個簡單且可行之製備金屬奈米粒子結構的方法。

In this study, the Langmuir monolayers were applied as templates to incorporate with the metal precursor ions from the subphases, and the monolayer template/metal precursor ion complexes were then transferred onto mica substrates with the Langmuir-Blodgett (LB) deposition technique. With the UV irradiation, metal nanoparticle structures were formed in the LB films by photoreduction reactions. Characteristics of the Langmuir monolayer templates were studied by the surface pressure-area isotherms obtained with the Wilhelmy plate method, and the morphology of the monolayer templates was observed by the Brewster angle microscope (BAM). The formation behavior of metal nanoparticles in the LB films of template/metal precursor ion with the UV irradiation was then detected by the transmission electron microscope and the atomic force microscope.
The experimental results indicated that the association of the metal precursor ions from the subphases with the Langmuir monolayer templates would result in the monolayer surface pressure-area isotherm shift and the monolayer morphology change. With the composition control of the monolayer templates, one could adjust the charge density of the templates and the amount of associated precursor ions, thus improving the deposition quality of the LB films. By using the Langmuir monolayer templates to incorporate with the metal nanoparticle precursor ions from the subphases, one could then fabricate metal nanoparticle structures in the resulting LB films by photoreduction reactions. The atomic force microscope analysis showed that with the UV irradiation, denser nanoparticles were formed in the LB films fabricated from monolayer templates with a higher adsorption capacity. In addition, metal nanoparticle structures with different morphology could be obtained in the LB films prepared from various monolayer templates. The results suggested that the template-synthesis approach with the LB deposition technique is an easy and applicable method to fabricate metal nanoparticle structures.

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