Related Experiment Video
Updated: Apr 6, 2026
08:53
Label-free Single Molecule Detection Using Microtoroid Optical Resonators
Published on: December 29, 2015
10.1K
NaCl ion detection using a silica toroid microcavity.
Applied Optics
|July 21, 2015
Summary
This study demonstrates a highly sensitive optical microcavity sensor for detecting sodium chloride (NaCl) particles and ions, and pH levels in water. The developed silica toroid microcavity sensor shows potential for advanced optofluidics applications.
Area of Science:
- Optofluidics
- Optical Sensing
- Nanotechnology
Background:
- Optical microcavities are crucial for developing sensitive optofluidic systems.
- High sensitivity and small device size are key requirements for optofluidic sensors.
Purpose of the Study:
- To demonstrate the detection of NaCl particles and ions in water using a silica toroid microcavity.
- To assess the sensitivity of the microcavity sensor for NaCl and pH detection.
- To integrate components for future optofluidics applications.
Main Methods:
- Utilized a silica toroid microcavity for optical sensing.
- Demonstrated detection of NaCl particles with a sample volume of 0.03 nL.
- Quantified NaCl ion detection sensitivity in liquid and pH sensitivity.
Main Results:
- Achieved a detection sensitivity of 0.38 mM for NaCl particles.
- Demonstrated a sensitivity of 3.20 mM for NaCl ions in liquid.
- Showed a potential pH detection sensitivity of 0.14 pH.
Conclusions:
- The silica toroid microcavity sensor offers high sensitivity for detecting NaCl and pH.
- The integrated system lays the groundwork for advanced optofluidic devices.
- This technology has significant implications for microscale chemical analysis.
More Related Videos
Related Concept Videos
01:21Gas Chromatography: Types of Detectors-I
2.0K
There are different types of detectors used in gas chromatography, each with its own specific properties that make it suitable for detecting certain types of analytes. The most commonly used detectors in GC are thermal conductivity detector (TCD), flame ionization detector (FID), and electron capture detector (ECD).
TCD is the earliest and most widely used detector that operates by measuring the changes in the thermal conductivity of the carrier gas. When a sample compound enters the detector,...
TCD is the earliest and most widely used detector that operates by measuring the changes in the thermal conductivity of the carrier gas. When a sample compound enters the detector,...
2.0K
01:15High-Performance Liquid Chromatography: Types of Detectors
2.2K
The role of the detectors in High-Performance Liquid Chromatography (HPLC) is to analyze the solutes as they exit from the chromatographic column. The detector recognizes the solute's property and generates corresponding electrical signals, which are converted into a readable graph of the detector's response versus elution time called a chromatogram at the computer. There are several types of HPLC detectors, each with its own advantages and limitations, depending on the analyte...
2.2K