Sonochemical Applications in Nanomaterials Synthesis
Summary
Sonochemistry harnesses the intense localised conditions generated by acoustic cavitation to drive the synthesis of nanomaterials with controlled composition, morphology and crystallinity. When ultrasonic waves propagate through a liquid medium, gas bubbles form, grow and collapse in microseconds, creating fleeting hotspots with temperatures of several thousand kelvin and pressures of hundreds of atmospheres. These extreme environments act as microreactors where the nucleation and growth of nanoparticles can be finely tuned without the need for high bulk temperatures or toxic reagents. Both top-down fragmentation and bottom-up assembly routes have been applied to produce metal, metal oxide, semiconductor and composite nanostructures. Sonochemical methods offer several compelling advantages, including reduced reaction times, improved homogeneity, and the elimination of surfactants or stabilisers. In recent years, this approach has been adapted across a range of applications—from catalytic systems for energy conversion to nanocarriers for drug delivery—highlighting its global significance in sustainable and scalable materials design.
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Sonochemical Applications in Nanomaterials Synthesis publication trend
The graph below shows the total number of articles in sonochemical applications in nanomaterials synthesis across all publications each year (not limited to Nature Index journals).
Technical terms
Acoustic cavitation: The formation, growth and implosive collapse of gas bubbles in a liquid under ultrasonic irradiation, generating extreme localised conditions.
Sonochemical synthesis: A process in which ultrasound-induced cavitation drives chemical reactions for nanoparticle nucleation and growth.
Nucleation: The initial aggregation of atoms or molecules into stable clusters that serve as seeds for nanoparticle formation.
Radical species: Highly reactive atoms or molecules (e.g., OH·, H·) produced during cavitation that facilitate redox reactions in solution.
Ultrasound frequency: The number of acoustic cycles per second (typically ≥20 kHz) that influences cavitation dynamics and energy release.
References
- A Review on Sonochemistry and Its Environmental Applications. Acoustics (2020).
- Free radical generation by ultrasound in aqueous and nonaqueous solutions.. Environmental Health Perspectives (1985).
- Sonoproduction of nanobiomaterials – A critical review. Ultrasonics Sonochemistry (2021).
- A review on recent advances in hydrogen energy, fuel cell, biofuel and fuel refining via ultrasound process intensification. Ultrasonics Sonochemistry (2021).
- Ultrasonics and sonochemistry: Editors’ perspective. Ultrasonics Sonochemistry (2023).
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