Diverse Nanomaterials Applied in Bio- and Electrochemical Sensing

Dear Colleagues,

The field of nanotechnology has witnessed significant advancements in recent years, leading to the development of diverse nanomaterials with promising applications in bio- and electrochemical sensing. These nanomaterials possess unique properties such as a high surface-area-to-volume ratio, excellent conductivity, and exceptional catalytic activity, making them suitable candidates for sensing applications.

One of the extensively studied nanomaterials is carbon nanotubes (CNTs), which have shown remarkable potential in biosensing. CNTs can be utilized as nanoelectrodes for detecting a range of biomolecules, including DNA, proteins, and enzymes. Their large surface area allows for increased analyte adsorption, resulting in enhanced sensitivity. Moreover, CNTs can be functionalized with various biomolecules, such as antibodies and aptamers, enabling selective detection of target analytes.

Another class of nanomaterials is metal nanoparticles, such as gold nanoparticles (AuNPs) and silver nanoparticles (AgNPs). These nanomaterials possess unique optical and electronic properties that can be exploited for bio- and electrochemical sensing. For instance, AuNPs can act as efficient nanocatalysts, accelerating redox reactions and enhancing sensing signal amplification. AgNPs, on the other hand, exhibit excellent surface-enhanced Raman scattering (SERS) performance, enabling the ultrasensitive detection of analytes through vibrational spectroscopy.

Furthermore, semiconductor nanomaterials, including quantum dots (QDs) and metal oxides, have attracted attention in bio- and electrochemical sensing due to their strong photoemission properties and high electron mobility. QDs offer size-dependent emission spectra, enabling the multiplexed detection of different analytes simultaneously. Metal oxides, such as titanium dioxide (TiO2) and zinc oxide (ZnO), can be used as sensitive materials in electrochemical sensors, facilitating the detection of various analytes.

In summary, diverse nanomaterials, including carbon nanotubes, metal nanoparticles, and semiconductor nanomaterials, have been extensively studied and applied in bio- and electrochemical sensing. These nanomaterials possess unique properties that contribute to enhanced sensitivity, selectivity, and signal amplification, enabling the detection of a wide range of analytes. Harnessing the potential of nanomaterials in sensing applications has great implications for fields such as medical diagnostics, environmental monitoring, and food safety.

Dr. Parvaneh Rahimi
Guest Editor

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• nanomaterials
• bio- and electrochemical sensing
• carbon nanotubes
• metal nanoparticles
• quantum dots
• metal oxides
• sensitivity
• selectivity
• signal amplification