Hydrogel diffraction gratings functionalized with crown ether for heavy metal ion detection
Hydrogel diffraction gratings functionalized with crown ether for heavy metal ion detection
复制标题
冠醚功能化水凝胶衍射光栅用于重金属离子检测
DOI：
10.1016/j.snb.2013.11.098
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发表时间：
2014-03
期刊：
影响因子：
--
通讯作者：
Xiaogong Wang
中科院分区：
文献类型：
--
作者：
Xiaoqi Wang;Gang Ye;Xiaogong Wang
含有冠醚官能团的水凝胶衍射栅是一种新型的重金属离子检测传感技术。将偶氮聚合物上的光致表面浮雕光栅(SRGs)软光刻复制到水凝胶表面，制得了水凝胶表面的光诱导表面浮雕光栅。在制造过程中，弹性体印章是通过对SRG承载母版进行复制模压而获得的。在DMSO/H2O混合溶液中，以丙烯酰胺、冠醚单体、交联剂和光引发剂为单体，通过微接触印刷的方法制备了水凝胶栅格。通过监测Pb2+在不同离子浓度的Pb2+溶液中的衍射效率变化，实现了对Pb2+离子的定量检测。衍射效率的变化是由于Pb2+离子与冠醚环的结合以及由于Donnan势增加了水凝胶中可移动反离子的数量而引起的。水凝胶中的可移动离子建立了过量的渗透压，导致了格栅的膨胀和DE的变化。在实验范围内，饱和衍射效率(DE/DE0)与Pb(NO3)2浓度呈线性关系。本研究开发的光栅对Pb2+离子具有良好的灵敏度，对分析物具有快速的响应和高的选择性。
Hydrogel diffraction gratings containing crown-ether functional groups were developed as a new sensing strategy for heavy metal ion detection. The gratings were fabricated by soft-lithographic duplication of photoinduced surface-relief-gratings (SRGs) on azo polymer masters to the hydrogel surfaces. In the fabrication, the elastomer stamps were obtained by replica-molding against the SRG-bearing masters. The hydrogel gratings were fabricated by micro-contact printing with the stamps andin situphoto-polymerization of acrylamide, crown ether monomer, crosslinker and photo-initiator in a mixed DMSO/H2O solution. The quantitative detection of Pb2+ions was achieved by monitoring the variation of diffraction efficiency of the gratings when exposed to Pb(NO3)2solutions with different ion concentrations. The diffraction efficiency (DE) variation was triggered by the binding of Pb2+ions with crown-ether rings and increasing amount of mobile counter-ions in the hydrogel due to Donnan potential. The mobile ions in the hydrogel established an excess osmotic pressure, which caused the grating to swell and DE variation. The saturated diffraction efficiency (DE/DE0) was observed to be linearly correlated with the Pb(NO3)2concentration in the testing range. The gratings developed in this study show excellent sensitivity to the Pb2+ion with the fast response and high selectivity to the analytes.
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影响因子：
13.6
作者：
G. Ye;Feifei Bai;Jichao Wei;Jianchen Wang;J. Chen
通讯作者：
G. Ye;Feifei Bai;Jichao Wei;Jianchen Wang;J. Chen
影响因子：
8.4
作者：
Sartore, Luciana;Barbaglio, Marzia;Borgese, Laura;Bontempi, Elza
通讯作者：
Bontempi, Elza
DOI：
10.1016/0015-6264(81)90402-8
发表时间：
2014
期刊：
--
影响因子：
--
作者：
M. Toprak;H. Karlsson;B. Fadeel
通讯作者：
M. Toprak;H. Karlsson;B. Fadeel
影响因子：
7.4
作者：
Holtz, JH;Holtz, JSW;Asher, SA
通讯作者：
Asher, SA
影响因子：
15
作者：
Deetz, MJ;Shang, M;Smith, BD
通讯作者：
Smith, BD