Metal & Metal-Oxide Nanoparticles
Metal-Oxide Nanoparticles: ZnO, TiO₂, SiO₂, Fe₃O₄ and More for Research
Nanoparticles are particles of roughly 1–100 nm whose properties differ from the bulk material. This page covers the metal-oxide nanoparticles most used in research, their applications, how to choose powder or dispersion, and how to characterise them.
- 1–100 nmnanoscale range
- Powders & dispersionswater, ethanol, glycols
- Oxides & metalsZnO, TiO₂, SiO₂, Fe₃O₄, Cu
- XRD testingAMI characterisation service
What are nanoparticles?
Nanoparticles have all three dimensions at the nanoscale, roughly 1–100 nm. Because most of their atoms sit at the surface, they are far more reactive than ordinary powders. Many metal oxides also show new behaviour at the nanoscale, such as the photocatalytic activity of TiO₂ and ZnO or the superparamagnetism of Fe₃O₄.
Nanoparticles and their applications
| Material | Key properties | Research applications |
|---|---|---|
| ZnO | Wide-band-gap semiconductor, UV absorber, antibacterial | Photocatalysts, gas sensors, antibacterial textiles, solar cells |
| TiO₂ (including P25) | Strongly photocatalytic under UV, chemically stable | Dye degradation, DSSC and perovskite solar cells, self-cleaning coatings |
| SiO₂ | Inert, high surface area, easy to modify | Composite fillers, drug carriers, coatings |
| Fe₃O₄ | Magnetic (superparamagnetic when small) | Magnetic separation, adsorbents, MRI contrast, catalysts |
| Al₂O₃ | Hard, insulating, heat-resistant | Ceramics, polishing, catalyst supports, nanofluids |
| CuO, Cu and Ag | Conductive (Cu, Ag), antibacterial, catalytic | Conductive inks, catalysts, sensors, antibacterial |
Nanoparticle products
Selected Nanografi products; particle size, purity and pack size are on each product page.
| Product | Best for | Price | Purchase |
|---|---|---|---|
| ZnO nanopowder | Photocatalysis, antibacterial, sensors | Rp 3.325.000 | Buy online |
| ZnO water dispersion | Direct coating | Rp 3.209.000 | Buy online |
| TiO₂ P25 nanopowder | Reference material for photocatalysis research | Rp 3.132.000 | Buy online |
| Rutile TiO₂ 99.5+%, 200 nm | Pigments, coatings, scattering layers | Rp 2.900.000 | Buy online |
| SiO₂ nanopowder | Composite fillers and carriers | Rp 2.590.000 | Buy online |
| Fe₃O₄ (magnetite) nanopowder | Magnetic separation and adsorbents | Rp 2.628.000 | Buy online |
| Al₂O₃ nanopowder | Ceramics and catalyst supports | Rp 2.164.000 | Buy online |
| CuO nanopowder | Catalysts and gas sensors | Rp 2.164.000 | Buy online |
| Copper (Cu) nanopowder | Conductive inks and catalysts | Rp 3.790.000 | Buy online |
| CeO₂ water dispersion | Polishing, catalysis, antioxidants | Rp 2.938.000 | Buy online |
| Silver nanopowder (Ossila M2444A1) | Conductive inks and antibacterial research | Rp 8.636.000 | Buy online |
Gold nanoparticles and colloidal silver can be requested via WhatsApp. Products are for research and laboratory use only, not for consumption or as finished cosmetic ingredients. Full specifications and SDS are on each product page.
Powder or dispersion?
Choose powder when
- You need to control the solvent, concentration or matrix yourself.
- The material will be calcined, dry-mixed or pressed.
- Long-term storage matters more.
Choose dispersion when
- You want to coat, spray or drop-cast straight away.
- Powder agglomeration is a problem and sonication equipment is limited.
- The solvent (water, ethanol, glycol) suits your process.
Characterising nanoparticles
| Technique | Information | Notes |
|---|---|---|
| XRD | Crystal phase and crystallite size (Scherrer equation) | Available via AMI's XRD service |
| TEM / SEM | Particle size and shape | TEM for particles < 50 nm |
| DLS | Hydrodynamic size in dispersion | Usually larger than TEM size because of agglomeration |
| BET | Specific surface area | Important for catalysts and adsorbents |
| UV-Vis DRS | Semiconductor band gap | Tauc plot |
Safety
Safety: nanopowders are easily inhaled. Weigh in a fume hood or ventilated enclosure, wear a respirator, gloves and goggles, and read the SDS before use.
Frequently asked questions
What are nanoparticles?
Particles of roughly 1–100 nm in all three dimensions, whose chemical and physical properties differ from the bulk because of their very large surface area.
Why is TiO₂ P25 often used as a reference?
P25 is a mixture of anatase and rutile phases widely used in photocatalysis literature, which makes results easy to compare.
How do I stop nanoparticles from agglomerating?
Use sonication, keep the pH away from the isoelectric point, add a surfactant or stabiliser, or choose a ready-made dispersion.
Are silver nanoparticles available?
Silver nanopowder from Ossila (M2444A1) is available. For colloidal silver or a specific size, send the specification via WhatsApp.
Need help choosing?
Tell us about your samples, methods and budget. Our team will put together the equipment and supplies with a formal quotation.
