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$Interference and Diffraction$ 02:18

Interference and Diffraction

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Related Experiment Video

Updated: Jan 27, 2026

An Objective and Child-friendly Assessment of Arm Function by Using a 3-D Sensor

An Objective and Child-friendly Assessment of Arm Function by Using a 3-D Sensor

Published on: February 12, 2018

Optical interference-based sensors for the visual detection of nano-scale objects.

Anna Frosiniuk¹, Denis S Kolchanov, Valentin A Milichko

¹ITMO University, International Laboratory "Solution Chemistry of Advanced Materials and Technologies", Lomonosova 9, 191002, Saint Petersburg, Russia. vinogradov@scamt-itmo.ru.

|March 20, 2019

Summary

We developed simple, chromogen-free sensors for detecting nanoscale objects in solutions. These interference-based sensors provide a visible color change upon analyte interaction, enabling naked-eye detection.

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Area of Science:

Nanotechnology
Materials Science
Optical Sensing

Background:

Visual detection of nano-scale objects in solutions is challenging.
Existing methods may require complex instrumentation or reagents.

Purpose of the Study:

To present a novel concept for simple visual detection of nano-scale objects.
To develop chromogen-free interference-based sensors for direct visual readout.

Main Methods:

Development of inkjet-printed sol-gel titania films.
Utilizing optical interference at the titania-analyte interface.
Controlling sensor color through film thickness adjustment.

Main Results:

Achieved chromogen-free, visible color reactions upon analyte interaction.
Demonstrated detection of nano-scale objects via naked-eye observation.
Established a synthetic strategy for tunable interference sensors.

Conclusions:

The developed interference sensors offer a straightforward method for visual nano-object detection.
Inkjet printing provides a versatile platform for fabricating tunable optical sensors.
This approach simplifies nano-scale analysis in solution-based systems.