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Related Concept Videos

Design Example: Resistive Touchscreen01:14

Design Example: Resistive Touchscreen

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A device engineer plays a crucial role in designing user interfaces for mobile devices. One such interface is the resistive touchscreen, which fundamentally consists of two metallic layers: a flexible upper layer and a rigid lower layer, separated by a narrow gap. The high resistance between these two layers is a key characteristic of this design.
When a user touches the screen, the two layers make contact at a specific point known as the touchpoint. This contact reduces the resistance between...
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Related Experiment Video

Updated: Feb 20, 2026

Ultrasensitive Detection of Biomarkers by Using a Molecular Imprinting Based Capacitive Biosensor
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Label-Free Multiplex DNA Detection Utilizing Projected Capacitive Touchscreen.

Joon Young Lee1, Byoung Yeon Won1, Hyun Gyu Park1

  • 1Department of Chemical and Biomolecular Engineering (BK21+ Program), Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea.

Biotechnology Journal
|October 14, 2017
PubMed
Summary
This summary is machine-generated.

A novel touchscreen system enables label-free, multiplex DNA detection for H1N1 influenza virus. This technology offers a convenient method for point-of-care testing (POCT) in diverse diagnostic applications.

Keywords:
BiosensorsCapacitanceDNA detectionPoint-of-care testingTouchscreen

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A Microfluidic-based Electrochemical Biochip for Label-free DNA Hybridization Analysis
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Area of Science:

  • Biotechnology
  • Nanotechnology
  • Biosensors

Background:

  • Multiplex DNA detection is crucial for molecular diagnostics.
  • Existing methods often require complex labeling and instrumentation.
  • Point-of-care testing (POCT) demands rapid, sensitive, and user-friendly diagnostic tools.

Purpose of the Study:

  • To develop a label-free multiplex DNA detection system using a projected capacitive touchscreen.
  • To demonstrate the system's capability for molecular diagnosis of H1N1 influenza virus.
  • To explore the potential of touchscreen technology for accessible diagnostic applications.

Main Methods:

  • Fabrication of an indium-tin-oxide (ITO) electrode array on a glass wafer.
  • Modification of electrodes with capture probe DNA sequences for H1N1 virus targets (H1, N1, M1).
  • Detection of target DNA hybridization via changes in capacitance measured by the touchscreen.

Main Results:

  • Successful label-free, multiplexed detection of H1N1 influenza virus DNA.
  • Hybridization events significantly enhanced electrode capacitance, enabling detection.
  • Demonstrated the feasibility of using projected capacitive touchscreens for molecular diagnostics.

Conclusions:

  • The developed touchscreen-based system provides a novel approach for label-free multiplex DNA detection.
  • This technology shows significant promise for advancing point-of-care testing (POCT) in clinical and diagnostic settings.
  • The system offers a convenient and potentially cost-effective solution for infectious disease diagnostics.