此研究利用雙螺旋二十四面體多孔高分子模板與掌控無電電鍍之成核成長機制，以創造一新穎之技術，製備單螺旋二十四面體奈米金屬材料。奈米多孔高分子模板以聚苯乙烯-聚左旋乳酸雙嵌段共聚物為系統，合成一具有雙螺旋二十四面體構型之共聚物，並利用鹼液水解聚左旋乳酸方式移除其成份，以製備雙螺旋二十四面體多孔高分子為模板並進行無電電鍍製程。接著，藉由毛細作用力將稀薄的鈀離子甲醇溶液填入到高分子模版的孔洞，再利用聯胺將鈀離子還原成鈀粒子，以做為金屬核種進行後續的無電電鍍，而稀疏的鈀粒子則有利於使鎳沉積還原成單螺旋二十四面體結構之奈米金屬材料。隨後將塊材浸入鎳的電鍍液中，進行鎳金屬還原步驟，在精準的掌控其成長條件後，並利用二氯甲烷移除高分子模版，即可得到單螺旋二十四面體奈米鎳材料。
在此新穎製程中，更可進一步調整無電電鍍鎳沉積時間，製備尺度從數百奈米到微米等級的單螺旋二十面體金屬顆粒鎳材料，不僅如此，具有不同晶格常數與填充率之單螺旋二十四面體鎳材也可以利用不同分子量與組成之多孔聚苯乙烯模板製備而得。為了拓展奈米金屬材料多樣的選擇性，此一製程也應用到奈米金金屬材料，以相同概念製備一單螺旋二十四面體奈米金金屬材料。

In this study, by taking advantage of the nucleation and growth control of templated electroless plating, a novel approach to fabricate metallic materials with single gyroid (SG) texture using polymer template with double gyroid (DG) texture is suggested. Nanoporous polystyrene (PS) with DG texture is prepared from the self-assembly of polystyrene-b-poly(L-lactide) (PS-PLLA) followed by hydrolysis of PLLA block, and then used as a template for templated electroless plating. With pore-filling of the dilute Pd solution to the PS template, homogeneously distributed Pd clusters within the PS template can be prepared by using hydrazine for the reduction of Pd ions, giving one single Pd nuclei for the growth of SG-structured Ni. Subsequently, the Ni deposition using the Pd nuclei as catalytic site can be carried out to form SG-structured Ni. Finally, nanoporous Ni with SG-structured texture can be obtained after removal of the PS template by washing with dichloromethane.
With the novel approach, SG-structured Ni with controlled particle radius from hundreds nm to micrometer can be prepared by tuning the growth time for the Ni deposition. Furthermore, tunable lattice constant of the SG-structured Ni and the corresponding filling ratio of the nanoporous Ni can be created from the pre-synthesized PS template with different molecular weights and compositions. To effectively achieve versatile purposes for optical applications, SG-structured Au is synthesized via the novel method as described above. As a result, this approach develop a platform technology to fabricate SG-structured metallic nanomaterials with versatile characteristic for novel properties from the nucleation and growth of templated electroless plating using self-assembled DG-structured block copolymers (BCPs) as templates.

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