私密直播全婐app免费大渔直播,国产av成人无码免费视频,男女同房做爰全过程高潮,国产精品自产拍在线观看

相關鏈接
聯系方式
  • 通信地址:南開區衛津路94號
  • 郵編:300071
  • 電話:86-22-23501657
  • 傳真:86-22-23503510
  • Email:yongjunzhang@nankai.edu.cn
當前位置:> 首頁 > 論文著作 > 正文
Facile Assembly of Large-Area 2D Microgel Colloidal Crystals Using Charge-Reversible Substrates
作者:Junying Weng, Xiaoyun Li, Ying Guan, * X.X. Zhu, Yongjun Zhang*
關鍵字:microgel
論文來源:期刊
具體來源:Langmuir, 2016, 32(48), 12876-12884
發表時間:2016年

2D colloidal crystals (CCs) have important applications; however, the fabrication of large-area, high-quality 2D CCs is still far from being trivial, and the fabrication of 2D microgel CCs is even harder. Here, we have demonstrated that they can be facilely fabricated using charge-reversible substrates. The charge-reversible substrates were prepared by modification with amino groups. The amino groups were then protected by amidation with 2,2-dimethylsuccinic anhydride. At acidic pH, the surface charge of the modified substrate will change from negative to positive as a result of the hydrolysis of the amide bonds and the regeneration of the amino groups. 2D microgel CCs can be simply fabricated by applying a concentrated microgel dispersion on the modified substrate. The negatively charged surface of the substrate allows the negatively charged microgel spheres, especially those close to the substrate, to self-assemble into 3D CCs. With the gradual hydrolysis of the amide bonds and the charge reversal of the substrate, the first 111 plane of the 3D assembly is fixed in situ on the substrate. The resulting 2D CC has a high degree of ordering because of the high quality of the parent 3D microgel CC. Because large-area 3D microgel CCs can be facilely fabricated, this method allows for the fabrication of 2D CCs of any size. Nonplanar substrates can also be used. In addition, the interparticle distance of the 2D array can be tuned by the concentration of the microgel dispersion. Besides rigid substrates (such as glass slides, quartz slides, and silicon wafers), flexible polymer films, including polyethylene terephthalate and poly(vinyl chloride) films, were also successfully used as substrates for the fabrication of 2D microgel CCs.



主站蜘蛛池模板: 长宁区| 宜兴市| 来宾市| 汝南县| 迭部县| 黑河市| 公安县| 蓝山县| 甘孜县| 北京市| 大石桥市| 当阳市| 濮阳县| 确山县| 惠安县| 武隆县| 瑞丽市| 通海县| 弥勒县| 新邵县| 临邑县| 张家港市| 浮山县| 察哈| 镇坪县| 淮安市| 二手房| 息烽县| 孟州市| 安国市| 姚安县| 乳山市| 安泽县| 黎平县| 于都县| 页游| 独山县| 西乌珠穆沁旗| 柳州市| 锡林郭勒盟| 阿尔山市|