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Title: Bisphenol-A sensors on polyimide fabricated by laser direct writing for on-site river water monitoring at attomolar concentration

Journal Article · · ACS Applied Materials and Interfaces
 [1];  [2];  [1];  [1];  [1];  [1];  [3];  [1];  [4];  [5]
  1. Univ. of Tennessee, Knoxville, TN (United States)
  2. Univ. of Tennessee, Knoxville, TN (United States); Sichuan Univ., Chengdu (People's Republic of China)
  3. Sichuan Univ., Chengdu (People's Republic of China)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  5. Univ. of Tennessee, Knoxville, TN (United States); Beijing Univ. of Technology, Beijing (People's Republic of China)

This work presents an aptamer-based, highly sensitive and specific sensor for atto- to femtomolar level detection of bisphenol A (BPA). Because of its widespread use in numerous products, BPA enters surface water from effluent discharges during its manufacture, use, and from waste landfill sites throughout the world. On-site measurement of BPA concentrations in water is important for evaluating compliance with water quality standards or environmental risk levels of the harmful compound in the environment. The sensor in this work is porous, conducting, interdigitated electrodes that are formed by laser-induced carbonization of flexible polyimide sheets. BPA-specific aptamer is immobilized on the electrodes as the probe, and its binding with BPA at the electrode surface is detected by capacitive sensing. The binding process is aided by ac electroosmotic effect that accelerates the transport of BPA molecules to the nanoporous graphene-like structured electrodes. The sensor achieved a limit of detection of 58.28 aM with a response time of 20 s. The sensor is further applied for recovery analysis of BPA spiked in surface water. In conclusion, this work provides an affordable platform for highly sensitive, real time, and field-deployable BPA surveillance critical to the evaluation of the ecological impact of BPA exposure.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1261363
Journal Information:
ACS Applied Materials and Interfaces, Journal Name: ACS Applied Materials and Interfaces; ISSN 1944-8244
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 79 works
Citation information provided by
Web of Science

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Cited By (12)

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High rate laser deposition of conductive copper microstructures from deep eutectic solvents journal January 2019
Laser-Induced Graphene: From Discovery to Translation journal October 2018
Laser-Scribed Lossy Microstrip Lines for Radio Frequency Applications journal January 2019
Rapid detection of ultra-trace nanoparticles based on ACEK enrichment for semiconductor manufacturing quality control journal December 2018
A highly sensitive aptasensor for on-site detection of lipopolysaccharides in food journal September 2018
Ultrafast Laser Pulses for Structuring Materials at Micro/Nano Scale: From Waveguides to Superhydrophobic Surfaces journal January 2017
Polymeric Nanocomposites (PNCs) for Wastewater Remediation: An Overview journal January 2018
Laser ablation of polymers: a review journal May 2019
Processing–structure–property relationship in direct laser writing carbonization of polyimide journal January 2020
Direct laser writing of graphene electrodes journal January 2020
Direct Laser Writing-Assisted Method for Template-Free Fabrication of Biomass-Based Porous Carbon Platelets with Uniform Size and Arbitrarily Designed Shapes journal March 2019