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A Guided Materials Screening Approach for Developing Quantitative Sol-gel Derived Protein Microarrays

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Development of a Screening Platform for Optimizing Chemical Nanosensor Materials.

Larissa Egger¹, Lisbeth Reiner¹, Florentyna Sosada-Ludwikowska¹

¹Microelectronics, Materials Center Leoben Forschung GmbH, 8700 Leoben, Austria.

Sensors (Basel, Switzerland)

|September 14, 2024

Summary

This study introduces a 16-sensor platform for efficiently screening gas-sensitive nanomaterials. Functionalized tin oxide (SnO2) sensors with nanoparticles showed enhanced responses to carbon monoxide and hydrocarbon mixtures.

Keywords:

hybrid nanomaterials metal oxide gas sensors nanoparticles nanosensors

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Area of Science:

Materials Science
Chemical Sensing
Nanotechnology

Background:

Chemical sensors often lack specificity, reacting to multiple gases.
Developing selective gas sensors requires systematic screening of new materials.
Nanomaterials offer tunable properties for enhanced sensor performance.

Purpose of the Study:

To develop a multi-sensor platform for high-throughput screening of gas-sensitive nanomaterials.
To evaluate the effect of nanoparticle functionalization on sensor performance.
To investigate sensor responses under varying humidity conditions.

Main Methods:

A silicon-based platform chip integrating 16 sensor structures was developed.
Ultrathin tin oxide (SnO2) films were functionalized with gold (Au), nickel-platinum (NiPt), and palladium (Pd) nanoparticles using ESJET printing.
Automated gas measurement setup enabled simultaneous characterization of 16 sensors towards carbon monoxide (CO) and a hydrocarbon mixture (HCmix) under 25%, 50%, and 75% relative humidity (r.h.).

Main Results:

All nanoparticle types, except palladium, enhanced sensor responses to CO and HCmix.
Optimal nanoparticle concentration for enhanced response was specific to the nanoparticle type.
Sensor performance varied with nanoparticle type, concentration, and humidity levels.

Conclusions:

The developed multi-sensor platform facilitates efficient screening of functionalized nanomaterials for gas sensing applications.
Nanoparticle functionalization significantly impacts the sensitivity and selectivity of SnO2-based chemical sensors.
Further research can optimize nanoparticle selection and concentration for specific gas detection.