Introducing DNA Nanosensor to Undergraduate Students: Rapid Non-Cross-Linking Aggregation of DNA-Functionalized Gold Nanoparticles for Colorimetric DNA Assay
Introducing DNA Nanosensor to Undergraduate Students: Rapid Non-Cross-Linking Aggregation of DNA-Functionalized Gold Nanoparticles for Colorimetric DNA Assay
复制标题
向本科生介绍 DNA 纳米传感器:用于比色 DNA 测定的 DNA 功能化金纳米颗粒的快速非交联聚集
DOI:
10.1021/acs.jchemed.1c00605
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发表时间:
2021
影响因子:
3
通讯作者:
Maeda Mizuo
中科院分区:
文献类型:
--
作者:
He Zhiyu;Ding Shansen;Wang Luyang;Wang Guoqing;Liang Xingguo;Takarada Tohru;Maeda Mizuo
Demonstration of a colorimetric approach for nucleic acid detection represents an attractive educational experiment for chemistry undergraduate students in the time of coronavirus pandemic. Herein, a rapid and vivid detection method that visualizes the presence of a specific DNA sequence is described. The plasmon resonance of gold nanoparticles (AuNPs) (∼20 nm in diameter) endows a red color to DNA-functionalized gold nanoparticles (DNA-AuNPs) in a colloidal solution. Simply upon addition of a sample containing the complementary DNA sequence, the DNA-AuNPs dispersed in a strong ionic solution can spontaneously aggregate in minutes and turn to be purple in color, which can be detected using UV–visible spectroscopy as well as the naked eye. In contrast, the DNA-AuNPs remain highly dispersed as a reddish colloid even at high ionic strength when the DNA sequence is terminally mismatched or overhung. According to the teaching experience, this DNA testing experiment can be accomplished by students in pairs or groups under instruction in a three-day lab session. Given the rapid and fail-proof DNA testing, the testing method is also well-suited for hands-on introduction of analytical chemistry and nanotechnology to chemistry freshman and high school students.
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DOI:
10.17863/cam.37551
发表时间:
2019
期刊:
--
影响因子:
--
作者:
Chen K
通讯作者:
Chen K
影响因子:
3.9
作者:
Lan Zhang;Chenlin Zhao;Yao Zhang;Luyang Wang;Guoqing Wang;N. Kanayama;T. Takarada;M. Maeda;Xingguo Liang
通讯作者:
Xingguo Liang
影响因子:
3
作者:
Campos, Antonio R.;Knutson, Cassandra M.;Penn, R. Lee
通讯作者:
Penn, R. Lee
影响因子:
3
作者:
J. Soukupová;L. Kvítek;Martina Kratochvílová;A. Panacek;R. Prucek;R. Zbořil
通讯作者:
R. Zbořil
影响因子:
56.9
作者:
Elghanian, R;Storhoff, JJ;Mirkin, CA
通讯作者:
Mirkin, CA