New core-shell hyperbranched chitosan-based nanoparticles as optical sensor for ammonia detection
New core-shell hyperbranched chitosan-based nanoparticles as optical sensor for ammonia detection
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DOI：
10.1016/j.ijbiomac.2016.01.118
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发表时间：
2016-05-01
影响因子：
8.2
通讯作者：
Salih, Ehab
中科院分区：
文献类型：
--
作者：
El-Sherbiny, Ibrahim M.;Hefnawy, Amr;Salih, Ehab
本文介绍了新型核壳端氨基超支化壳聚糖纳米粒子(HBCS-NH2)的制备方法。对所合成的纳米粒子进行了金刚三酮分析、红外光谱、热重分析和电子能谱分析。以新制备的(HBCs-NH_2)纳米粒子为平台，通过FTIR、UV-Vis、X-射线衍射仪、扫描电子显微镜和高分辨电子显微镜对其进行了表征。将(HBCs-NH2)纳米颗粒悬浮液的颜色从无色变为黄色，以及在400 nm处出现表面等离子体共振(SPR)峰，也可以观察到AgNPs的形成。HRTEM显示得到的HBCs-NH2纳米粒子具有均匀的球形，平均尺寸为400 nm，AgNPs主要形成在其表面，平均尺寸为20-50 nm。新开发的(HBCs-NH2)NPs-AgNPs作为光学传感器具有很大的潜力，可以基于SPR的变化来有效地检测溶液中的氨浓度。(C)2016爱思唯尔B.V.保留所有权利。
In this paper, preparation of new core-shell amino-terminated hyperbranched chitosan nanoparticles (HBCs-NH2) NPs is described. The synthesized nanoparticles were characterized using ninhydrin assay, FTIR, TGA, and FESEM. The newly prepared (HBCs-NH2) NPs were then used as a platform for facile and controlled synthesis of silver nanoparticles (AgNPs) which was confirmed using FTIR, UV-vis spectrometry, X-ray diffraction, SEM and HRTEM. Formation of the AgNPs was also noted upon changing the color of (HBCs-NH2) NPs suspension from colorless into yellow as well as through the appearance of surface plasmon resonance (SPR) peak at 400 nm. HRTEM showed a uniform and spherical morphology of the resulting HBCs-NH2 NPs with average size 400 nm, and the AgNPs were formed mainly on their surface with average size of 20-50nm. The newly developed (HBCs-NH2) NPs-AgNPs showed a great potential as optical sensor for efficient detection of the ammonia concentration in solutions based on the change in the SPR. (C) 2016 Elsevier B.V. All rights reserved.