TY - JOUR
T1 - Ultra-sensitive in situ detection of silver ions using a quartz crystal microbalance
AU - Lee, Sangmyung
AU - Jang, Kuewhan
AU - Park, Chanho
AU - You, Juneseok
AU - Kim, Taegyu
AU - Im, Chulhwan
AU - Kang, Junoh
AU - Shin, Haneul
AU - Choi, Chang Hwan
AU - Park, Jinsung
AU - Na, Sungsoo
N1 - Publisher Copyright:
© 2015 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.
PY - 2015/7/27
Y1 - 2015/7/27
N2 - The detection of toxic nanomaterials is highly important, because their scientific and engineering applications have rapidly increased recently. Consequently, they can harmfully impact human health and the environment. Herein, we report a quartz crystal microbalance (QCM)-based, in situ and real-time detection of toxic silver ions by measuring a frequency shift. Generally, silver ions are so small that they are difficult to be identified using conventional microscopy. However, using QCM and a label-free silver-specific cytosine DNA, ultra-sensitive and in situ detection of silver ions is performed. The limit of detection (LOD) of this sensor platform is 100 pM, which is ten times lower than the previous study using a cantilever. It also detects silver ions rapidly in real time, which is completed within 10 min. Furthermore, our proposed detection method is able to detect silver ions in drinking water. The results suggest that QCM-based detection opens a new avenue for the development of a practical water testing sensor.
AB - The detection of toxic nanomaterials is highly important, because their scientific and engineering applications have rapidly increased recently. Consequently, they can harmfully impact human health and the environment. Herein, we report a quartz crystal microbalance (QCM)-based, in situ and real-time detection of toxic silver ions by measuring a frequency shift. Generally, silver ions are so small that they are difficult to be identified using conventional microscopy. However, using QCM and a label-free silver-specific cytosine DNA, ultra-sensitive and in situ detection of silver ions is performed. The limit of detection (LOD) of this sensor platform is 100 pM, which is ten times lower than the previous study using a cantilever. It also detects silver ions rapidly in real time, which is completed within 10 min. Furthermore, our proposed detection method is able to detect silver ions in drinking water. The results suggest that QCM-based detection opens a new avenue for the development of a practical water testing sensor.
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U2 - 10.1039/c5nj00668f
DO - 10.1039/c5nj00668f
M3 - Article
AN - SCOPUS:84942894380
SN - 1144-0546
VL - 39
SP - 8028
EP - 8034
JO - New Journal of Chemistry
JF - New Journal of Chemistry
IS - 10
ER -