高等学校化学学报
高等學校化學學報
고등학교화학학보
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES
2014年
5期
1106-1110
,共5页
薛培宏%王铁强%艾斌%叶顺盛%李东风%张俊虎
薛培宏%王鐵彊%艾斌%葉順盛%李東風%張俊虎
설배굉%왕철강%애빈%협순성%리동풍%장준호
胶体晶体%等离子体刻蚀%光固化树脂%金纳米碗%表面等离子体共振
膠體晶體%等離子體刻蝕%光固化樹脂%金納米碗%錶麵等離子體共振
효체정체%등리자체각식%광고화수지%금납미완%표면등리자체공진
Colloidal crystal%Plasma etching%Photoresist oligomer%Gold nanobowl%Surface plasmon resonance
以二氧化硅微球为掩板,利用各向异性等离子体刻蚀技术对光固化树脂薄膜进行选择性刻蚀,制备出微纳级的顶端带凹陷的柱状结构.在材料表面蒸镀一层金后,得到微纳米级柱顶端带有金纳米碗的特殊结构.通过调整刻蚀时间可以改变光固化树脂薄膜表面的柱状结构的高度.随着柱状结构高度的增加,材料的特征峰从500 nm红移至760 nm.运用时域有限差分( FDTD)方法对这种含贵金属结构的电场分布进行模拟,发现在金纳米碗状结构的边缘处存在高强度的电场,这是材料特征峰产生的原因.这种由材料表面结构变化导致材料在光谱中特征峰迁移的现象在传感、光通讯及小型化光学器件和药物筛选等领域具有潜在应用的价值.
以二氧化硅微毬為掩闆,利用各嚮異性等離子體刻蝕技術對光固化樹脂薄膜進行選擇性刻蝕,製備齣微納級的頂耑帶凹陷的柱狀結構.在材料錶麵蒸鍍一層金後,得到微納米級柱頂耑帶有金納米碗的特殊結構.通過調整刻蝕時間可以改變光固化樹脂薄膜錶麵的柱狀結構的高度.隨著柱狀結構高度的增加,材料的特徵峰從500 nm紅移至760 nm.運用時域有限差分( FDTD)方法對這種含貴金屬結構的電場分佈進行模擬,髮現在金納米碗狀結構的邊緣處存在高彊度的電場,這是材料特徵峰產生的原因.這種由材料錶麵結構變化導緻材料在光譜中特徵峰遷移的現象在傳感、光通訊及小型化光學器件和藥物篩選等領域具有潛在應用的價值.
이이양화규미구위엄판,이용각향이성등리자체각식기술대광고화수지박막진행선택성각식,제비출미납급적정단대요함적주상결구.재재료표면증도일층금후,득도미납미급주정단대유금납미완적특수결구.통과조정각식시간가이개변광고화수지박막표면적주상결구적고도.수착주상결구고도적증가,재료적특정봉종500 nm홍이지760 nm.운용시역유한차분( FDTD)방법대저충함귀금속결구적전장분포진행모의,발현재금납미완상결구적변연처존재고강도적전장,저시재료특정봉산생적원인.저충유재료표면결구변화도치재료재광보중특정봉천이적현상재전감、광통신급소형화광학기건화약물사선등영역구유잠재응용적개치.
A novel method was developed to fabricate the structure of a bowl on the top of column on nano/micro scale by selectively etching the photoresist oligomer film using the silica microspheres as masks. The gold nanobowl was formed on the top of the columnar structure as depositing a layor of Au on the surface of sample. By adjusting etching time, the dimension of columnar structure can be controlled. The characteristic transmission band of the material shows a obvious red shift from 500 nm to 760 nm when the height of the co-lumnar structure increases. To investigate the optical property caused by the unique structure and the distribu-tion of electric field around the noble metal, the method of the finite difference time domain was used. The high intensity of electric field was found at the edges and bottom of the gold nanobowl, which is the main influencing factor of the red shift.