自然界有許多複雜的生物結構是高度結合的有機物與無機物，如生物體中的骨頭、牙齒以及海洋中的海藻、貝類等，有機—無機複合材料，是經由分子自組裝過程形成各種階層式結構，本研究模擬自然界生物成礦行為以合成有機—無機複合材料，探討有機界面活性劑分子與無機物分子的自組裝行為，並製備具有螺旋型態的孔洞氧化矽材料。利用材料具有孔洞且構型為螺旋狀的特點，和液晶分子混合，做成簡易液晶顯示器，材料上的孔洞使液晶分子可以和材料之間產生錨定力，加上其構型為長條螺旋狀，可以將向列型液晶相切割成更多的散射區塊，達到降低光穿透度的效果，提升顯示器的對比度。
研究中成功地利用陽離子界面活性劑(C16TMAB或C18TMACl) 和助界面活性劑(水楊酸或SDS)在特定比例下，和TEOS經過簡單的混合攪拌，即可合成出螺旋狀的孔洞氧化矽材料。以水楊酸當助界面活性劑的螺旋氧化矽長度約數微米至數十微米，管徑約100 nm，表面積約460 m2/g，孔徑約2.5 nm，；以SDS當助界面活性劑的螺旋氧化矽長度約數十微米至數百微米，管徑約400 nm，表面積高達930 m2/g，孔徑2.7 nm。將螺旋狀氧化矽和5CB液晶分子混合，製成簡易的顯示器，施加電壓便可操控顯示器的穿透度，中孔洞螺旋狀氧化矽產物施加電壓後穿透度高達85％，關電壓後回復百分比37％，而微孔洞螺旋狀氧化矽產物施加電壓後，穿透度約78％，關電壓後回復百分比93％。
本論文另一部分是探討添加的孔洞氧化矽材料構型、孔徑、顆粒大小均對液晶顯示器的光學性質的影響，這些變因彼此交互影響。為了瞭解孔徑對顯示器的影響，用粒徑均一且孔洞可控制的氧化矽空心球當作添加材。以500 nm壓克力模板球為硬模板，合成出氧化矽空心球，藉由使用不同的表面活性劑改變空心球的孔徑，製成簡易液晶顯示器，發現孔徑大小相同的空心球，液晶行為也相似，顯示器施加電壓前、後會有相同的穿透度。微孔的樣品施加電壓後，也無法有高的穿透度、且回復力不好(穿透度最高58％，回復百分比2.5％)；孔徑2.0 nm以上的樣品穿透度都超過90％，回復百分比70％。

Molecular self-assembly behavior generally existing in the living systems is the basis of complex biological structure. In this thesis, we mimic the biomineralization to fabricate porous silica materials in helical morphology and mesostructure. Mixing the porous silica materials with nematic liquid crystal to produce smart window, whose light transmission properties are altered when voltage is applied. Transmittance of display’s transparent is 85 % and recovery percentage is 37 % in mesoporous helical material. In microporous material, the transmittance of display’s transparent is 78 % and recovery percentage is 93 %. We also used tunable pore size hollow silica sphere to mix with nematic liquid crystal. When particle size and morphology are fixed, materials with same pore size have same transmittance change. Display with microporous hollow silica sphere have low transparent and low recovery percentage (58 % and 2.5 %). Display with pore size larger than 2 nm have 90 % transmittance in transparent state and 70 % recovery percentage.

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