TY - JOUR
T1 - Size-Selective Detection of Nanoparticles in Solution and Air by Imprinting
AU - Dery, Linoy
AU - Shauloff, Nitzan
AU - Turkulets, Yury
AU - Shalish, Ilan
AU - Jelinek, Raz
AU - Mandler, Daniel
N1 - Publisher Copyright:
© 2022 American Chemical Society
PY - 2022/1/28
Y1 - 2022/1/28
N2 - Monitoring of nanoparticles (NPs) in air and aquatic environments is an unmet challenge accentuated by the rising exposure to anthropogenic or engineered NPs. The inherent heterogeneity in size, shape, and the stabilizing shell of NPs makes their selective recognition a daunting task. Thus far, only a few technologies have shown promise in detecting NPs; however, they are cumbersome, costly, and insensitive to the NPs morphology or composition. Herein, we apply an approach termed nanoparticle-imprinted matrices (NAIM), which is based on creating voids in a thin layer by imprinting NPs followed by their removal. The NAIM was formed on an interdigitated electrode (IDE) and used for the size-selective detection of silica NPs. Three- and 5-fold increases in capacitance were observed for the reuptake of NPs with similar diameter, compared to smaller or larger NPs, in air and liquid phase, respectively. En masse, the proposed approach lays the foundation for the emergence of field-effective, inexpensive, real-life applicable sensors that will allow online monitoring of NPs in air and liquids.
AB - Monitoring of nanoparticles (NPs) in air and aquatic environments is an unmet challenge accentuated by the rising exposure to anthropogenic or engineered NPs. The inherent heterogeneity in size, shape, and the stabilizing shell of NPs makes their selective recognition a daunting task. Thus far, only a few technologies have shown promise in detecting NPs; however, they are cumbersome, costly, and insensitive to the NPs morphology or composition. Herein, we apply an approach termed nanoparticle-imprinted matrices (NAIM), which is based on creating voids in a thin layer by imprinting NPs followed by their removal. The NAIM was formed on an interdigitated electrode (IDE) and used for the size-selective detection of silica NPs. Three- and 5-fold increases in capacitance were observed for the reuptake of NPs with similar diameter, compared to smaller or larger NPs, in air and liquid phase, respectively. En masse, the proposed approach lays the foundation for the emergence of field-effective, inexpensive, real-life applicable sensors that will allow online monitoring of NPs in air and liquids.
KW - Nanoparticles detection
KW - aerosol
KW - capacitive sensing
KW - imprinting
KW - interdigitated electrode
KW - nanoparticle-imprinted matrices
UR - http://www.scopus.com/inward/record.url?scp=85123433307&partnerID=8YFLogxK
U2 - 10.1021/acssensors.1c02324
DO - 10.1021/acssensors.1c02324
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C2 - 35014805
AN - SCOPUS:85123433307
SN - 2379-3694
VL - 7
SP - 296
EP - 303
JO - ACS Sensors
JF - ACS Sensors
IS - 1
ER -