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Related Experiment Video

Updated: May 24, 2026

Controllable Ion Channel Expression through Inducible Transient Transfection
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Controllable Ion Channel Expression through Inducible Transient Transfection

Published on: February 17, 2017

Control release of bactericidal ion by an electronically driven system.

Kuo-Hsiung Tseng1, Chih-Yu Liao, Der-Chi Tien

  • 1Department of Electrical Engineering, National Taipei University of Technology, Da-An District, Taipei 10608, Taiwan, ROC.

Journal of Nanoscience and Nanotechnology
|March 14, 2012
PubMed
Summary

This study introduces an electronic dissociation system (EDS) for generating silver ions from nanoparticles, offering a controllable method for iontophoretic drug delivery. The constant current mode provides precise control over ion release profiles for medical applications.

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Area of Science:

  • Nanotechnology
  • Materials Science
  • Biomedical Engineering

Background:

  • Metallic nanoparticles, particularly silver, show bactericidal properties and have historical medical uses.
  • Existing methods for delivering silver ions often involve silver salts, which introduce potentially harmful counter-ions.
  • There is a lack of research on using metallic nanoparticle suspensions as reservoirs for iontophoretic drug delivery.

Purpose of the Study:

  • To develop an electronic dissociation system (EDS) for generating controlled release of bactericidal silver ions (Ag+) from silver nanoparticles.
  • To investigate the controllability of ion release profiles using the EDS for iontophoretic applications.
  • To establish a safer alternative to silver salts for medical iontophoretic delivery.

Main Methods:

  • An electronic dissociation system (EDS) was designed and implemented to generate silver ions from silver nanoparticles.
  • An ionic selective electrode (ISE) was utilized to monitor and analyze the system's activity.
  • Both constant voltage (CV) and constant current (CC) modes were employed to control ion release, with qualitative and quantitative data analysis.

Main Results:

  • The EDS demonstrated control over ion-releasing profiles, including dosage (AUC), release rate, dissociation time, and peak concentration.
  • The constant current (CC) mode offered superior control compared to the constant voltage (CV) mode.
  • A precise relationship was observed in CC mode: a 200 microA increase corresponded to a 1 ppm/hour increase in ion concentration.

Conclusions:

  • The developed EDS provides a controllable method for generating bactericidal silver ions from nanoparticles for iontophoretic applications.
  • The constant current mode offers enhanced precision and predictability for ion release.
  • This technology promises chemical residue-free, controlled-release medical devices for iontophoresis.