本文主要研究内容
作者魏珍妮(2019)在《用于可视化检测的纳米探针的制备及其应用研究》一文中研究指出:纳米材料的表面效应、小尺寸效应、宏观量子隧道效应、量子尺寸效应及介电限域效应对纳米材料的光、磁、电、热、力学等性能会产生一定影响,使其广泛用于催化、传感、食品及生物医学等领域。近年来,可用于可视化检测的纳米探针因其快速、方便、灵敏的检测优势得到关注。由于三维石墨烯具有较大的比表面积,具有类酶催化性质的金属或金属氧化物负载的三维石墨烯纳米复合材料可以有效地促进电子转移,从而提供更多活性位点以增强其催化性质。然而,为了获得更好的催化效果,大多数已报道的类酶催化材料需掺杂贵金属,成本较高。碳点具有良好的光学和化学稳定性、低毒性、制备简单等优势,广泛用于生物传感及成像,并且可以借助紫外灯实现可视化检测。然而,目前已报道碳点的发射波长及检测模式较为单一。基于此,本学位论文开展了以下创新工作:1.一步法合成三维还原型氧化石墨烯-铁酸镍/氧化镍纳米颗粒(3DRGO-NiFe2O4/NiO NPs)用于H2O2和有机磷农药的可视化检测本工作通过水热法一步制备成本较低、与贵金属催化效果相当、具有类过氧化物酶催化性质的三维还原型氧化石墨烯-铁酸镍/氧化镍纳米颗粒(3DRGO-NiFe2O4/NiO NPs),可用于催化H2O2分解产生羟基自由基(·OH),通过氧化底物3,3’,5,5’-四甲基联苯胺(TMB)显蓝色检测H2O2,检测限(LOD)低至0.1μM。因为乙酰胆碱(AChCl)中加入乙酰胆碱酶(AChE)和胆碱氧化酶(ChOx)后能够生成H2O2,而有机磷农药(OPs)会抑制AChE的活性。本工作基于3DRGO-NiFe2O4/NiO NPs的催化性能,利用上述反应,构建了一个可视化检测OPs的体系,并以敌敌畏(DDVP)为模型化合物,考察了材料可视化检测OPs的性能,并在此基础上构建了检测试纸,通过将检测试纸与智能手机软件(APP)结合实现了蔬菜和水果中的残留DDVP的快速、灵敏检测。2.比率荧光碳点(RIM-CDs)用于紫外灯下可视化检测ClO-及细胞成像本工作通过水热法一步合成了一种双发射碳点(RIM-CDs),在360 nm波长激发下,该碳点在426和541 nm处有两个发射峰。加入ClO-后,426 nm处的发射峰强度会减弱而541 nm处的则会增强,这个过程可以借助紫外灯观察到溶液荧光颜色的变化。RIM-CDs比率测定ClO-的检测限为0.93μM(线性范围2.5-55μM),并且可以实现ClO-的选择性检测。选择血清和小鼠脑脊液作为实际样品进行测定,回收率结果较好。此外,该探针在HeLa细胞中的毒性较低,实现了细胞内ClO-的比率检测。3.荧光-比色双模式碳点(RD-CDs)用于细胞内源性和外源性ClO-成像本工作制备的RD-CDs可用于荧光比色双模式检测ClO-。荧光模式对ClO-的检测限为0.083μM(线性范围为0.1-100μM),比色模式检测限为2.2μM(线性范围为5-200μM)。与上一个工作中制备的RIM-CDs相比,RD-CDs对ClO-的检测灵敏度得到了提高且能够实现双模式检测。荧光和比色模式均可用于实际样品血清和小鼠脑脊液中ClO-含量的测定,回收率结果较好。通过HeLa细胞和RAW264.7细胞实验证明该探针能够实现细胞内源性和外源性ClO-的成像。
Abstract
na mi cai liao de biao mian xiao ying 、xiao che cun xiao ying 、hong guan liang zi sui dao xiao ying 、liang zi che cun xiao ying ji jie dian xian yu xiao ying dui na mi cai liao de guang 、ci 、dian 、re 、li xue deng xing neng hui chan sheng yi ding ying xiang ,shi ji an fan yong yu cui hua 、chuan gan 、shi pin ji sheng wu yi xue deng ling yu 。jin nian lai ,ke yong yu ke shi hua jian ce de na mi tan zhen yin ji kuai su 、fang bian 、ling min de jian ce you shi de dao guan zhu 。you yu san wei dan mo xi ju you jiao da de bi biao mian ji ,ju you lei mei cui hua xing zhi de jin shu huo jin shu yang hua wu fu zai de san wei dan mo xi na mi fu ge cai liao ke yi you xiao de cu jin dian zi zhuai yi ,cong er di gong geng duo huo xing wei dian yi zeng jiang ji cui hua xing zhi 。ran er ,wei le huo de geng hao de cui hua xiao guo ,da duo shu yi bao dao de lei mei cui hua cai liao xu can za gui jin shu ,cheng ben jiao gao 。tan dian ju you liang hao de guang xue he hua xue wen ding xing 、di du xing 、zhi bei jian chan deng you shi ,an fan yong yu sheng wu chuan gan ji cheng xiang ,bing ju ke yi jie zhu zi wai deng shi xian ke shi hua jian ce 。ran er ,mu qian yi bao dao tan dian de fa she bo chang ji jian ce mo shi jiao wei chan yi 。ji yu ci ,ben xue wei lun wen kai zhan le yi xia chuang xin gong zuo :1.yi bu fa ge cheng san wei hai yuan xing yang hua dan mo xi -tie suan nie /yang hua nie na mi ke li (3DRGO-NiFe2O4/NiO NPs)yong yu H2O2he you ji lin nong yao de ke shi hua jian ce ben gong zuo tong guo shui re fa yi bu zhi bei cheng ben jiao di 、yu gui jin shu cui hua xiao guo xiang dang 、ju you lei guo yang hua wu mei cui hua xing zhi de san wei hai yuan xing yang hua dan mo xi -tie suan nie /yang hua nie na mi ke li (3DRGO-NiFe2O4/NiO NPs),ke yong yu cui hua H2O2fen jie chan sheng qiang ji zi you ji (·OH),tong guo yang hua de wu 3,3’,5,5’-si jia ji lian ben an (TMB)xian lan se jian ce H2O2,jian ce xian (LOD)di zhi 0.1μM。yin wei yi xian dan jian (AChCl)zhong jia ru yi xian dan jian mei (AChE)he dan jian yang hua mei (ChOx)hou neng gou sheng cheng H2O2,er you ji lin nong yao (OPs)hui yi zhi AChEde huo xing 。ben gong zuo ji yu 3DRGO-NiFe2O4/NiO NPsde cui hua xing neng ,li yong shang shu fan ying ,gou jian le yi ge ke shi hua jian ce OPsde ti ji ,bing yi di di wei (DDVP)wei mo xing hua ge wu ,kao cha le cai liao ke shi hua jian ce OPsde xing neng ,bing zai ci ji chu shang gou jian le jian ce shi zhi ,tong guo jiang jian ce shi zhi yu zhi neng shou ji ruan jian (APP)jie ge shi xian le shu cai he shui guo zhong de can liu DDVPde kuai su 、ling min jian ce 。2.bi lv ying guang tan dian (RIM-CDs)yong yu zi wai deng xia ke shi hua jian ce ClO-ji xi bao cheng xiang ben gong zuo tong guo shui re fa yi bu ge cheng le yi chong shuang fa she tan dian (RIM-CDs),zai 360 nmbo chang ji fa xia ,gai tan dian zai 426he 541 nmchu you liang ge fa she feng 。jia ru ClO-hou ,426 nmchu de fa she feng jiang du hui jian ruo er 541 nmchu de ze hui zeng jiang ,zhe ge guo cheng ke yi jie zhu zi wai deng guan cha dao rong ye ying guang yan se de bian hua 。RIM-CDsbi lv ce ding ClO-de jian ce xian wei 0.93μM(xian xing fan wei 2.5-55μM),bing ju ke yi shi xian ClO-de shua ze xing jian ce 。shua ze xie qing he xiao shu nao ji ye zuo wei shi ji yang pin jin hang ce ding ,hui shou lv jie guo jiao hao 。ci wai ,gai tan zhen zai HeLaxi bao zhong de du xing jiao di ,shi xian le xi bao nei ClO-de bi lv jian ce 。3.ying guang -bi se shuang mo shi tan dian (RD-CDs)yong yu xi bao nei yuan xing he wai yuan xing ClO-cheng xiang ben gong zuo zhi bei de RD-CDske yong yu ying guang bi se shuang mo shi jian ce ClO-。ying guang mo shi dui ClO-de jian ce xian wei 0.083μM(xian xing fan wei wei 0.1-100μM),bi se mo shi jian ce xian wei 2.2μM(xian xing fan wei wei 5-200μM)。yu shang yi ge gong zuo zhong zhi bei de RIM-CDsxiang bi ,RD-CDsdui ClO-de jian ce ling min du de dao le di gao ju neng gou shi xian shuang mo shi jian ce 。ying guang he bi se mo shi jun ke yong yu shi ji yang pin xie qing he xiao shu nao ji ye zhong ClO-han liang de ce ding ,hui shou lv jie guo jiao hao 。tong guo HeLaxi bao he RAW264.7xi bao shi yan zheng ming gai tan zhen neng gou shi xian xi bao nei yuan xing he wai yuan xing ClO-de cheng xiang 。
论文参考文献
论文详细介绍
论文作者分别是来自兰州大学的魏珍妮,发表于刊物兰州大学2019-07-29论文,是一篇关于纳米探针论文,可视化检测论文,荧光比色双模式论文,细胞成像论文,兰州大学2019-07-29论文的文章。本文可供学术参考使用,各位学者可以免费参考阅读下载,文章观点不代表本站观点,资料来自兰州大学2019-07-29论文网站,若本站收录的文献无意侵犯了您的著作版权,请联系我们删除。
标签:纳米探针论文; 可视化检测论文; 荧光比色双模式论文; 细胞成像论文; 兰州大学2019-07-29论文;