Related Experiment Video
Updated: Aug 6, 2026
08:27
Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation
Published on: August 28, 2017
Microdroplets as ambient 'hydrothermal' reactors
Anand Narayanan1, Anubhav Mahapatra1, Sonali Seth1
1DST Unit of Nanoscience (DST UNS) & Thematic Unit of Excellence (TUE), Department of Chemistry, Indian Institute of Technology Madras (IITM), Chennai 600036, India. depanjan_coe@icsrpis.iitm.ac.in.
Nanoscale
|July 20, 2026
Summary
Researchers developed a novel microdroplet method for synthesizing porous copper oxide (CuO) nanostructures at room temperature. This energy-efficient process mimics hydrothermal conditions and yields CuO with superior uranium removal capabilities.
Area of Science:
- Materials Science
- Nanotechnology
- Environmental Chemistry
Background:
- Microdroplet reactors offer unique reaction environments.
- Hydrothermal synthesis is effective but requires high temperatures and pressures.
- Developing ambient condition synthesis methods for nanostructures is crucial.
Purpose of the Study:
- To report a microdroplet-enabled strategy for room-temperature synthesis of tenorite (CuO) nanostructures.
- To investigate the potential of microdroplets as "ambient hydrothermal" reactors.
- To evaluate the performance of synthesized CuO for U(VI) removal.
Main Methods:
- Ultrasonic nebulization of copper acetate monohydrate in ethanol-water solutions.
- Formation of confined microenvironments with rapid solvent evaporation and concentration gradients.
- Room-temperature synthesis of phase-pure, porous, flower-like CuO nanostructures.
Main Results:
- Phase-pure, porous, flower-like CuO nanostructures were synthesized at room temperature.
- The synthesized CuO demonstrated rapid U(VI) removal from 1000 ppb to below 10 ppb in 5 minutes.
- Achieved over 20-fold higher efficiency compared to commercial CuO, retaining structural integrity.
Conclusions:
- Microdroplets can serve as effective "ambient hydrothermal" reactors for nanostructure synthesis.
- The gram-scale, energy-efficient method eliminates high-temperature calcination.
- This scalable, surfactant-free route offers a new approach for complex oxide nanostructures.
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