{ "id": "ep8ve7yvy3", "slug": "aerosol-assisted-chemical-vapor-deposition", "title": "Aerosol-assisted chemical vapor deposition", "updated": "2026-10-15", "topic_path": [ { "id": "physical", "label": "Physical world and mathematics", "api_url": "https://www.edgepedia.org/api/v1/topics/physical" }, { "id": "physical.chemistry", "label": "Chemistry", "api_url": "https://www.edgepedia.org/api/v1/topics/physical.chemistry" }, { "id": "physical.chemistry.methods", "label": "Chemical principles and methods", "api_url": "https://www.edgepedia.org/api/v1/topics/physical.chemistry.methods" }, { "id": "physical.chemistry.methods.chemical-synthesis", "label": "Chemical synthesis", "api_url": "https://www.edgepedia.org/api/v1/topics/physical.chemistry.methods.chemical-synthesis" } ], "geo": [ { "id": "geo.nongeo.t1946.physical.chemistry.methods.chemical-synthesis", "label": "Non-geographic · 1946 to 2000: Chemical synthesis", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1946.physical.chemistry.methods.chemical-synthesis", "path": [ { "id": "geo.nongeo", "label": "Non-geographic", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo" }, { "id": "geo.nongeo.t1946", "label": "Non-geographic · 1946 to 2000", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1946" }, { "id": "geo.nongeo.t1946.physical", "label": "Physical world and mathematics", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1946.physical" }, { "id": "geo.nongeo.t1946.physical.chemistry", "label": "Chemistry", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1946.physical.chemistry" }, { "id": "geo.nongeo.t1946.physical.chemistry.methods", "label": "Chemical principles and methods", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1946.physical.chemistry.methods" }, { "id": "geo.nongeo.t1946.physical.chemistry.methods.chemical-synthesis", "label": "Chemical synthesis", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.nongeo.t1946.physical.chemistry.methods.chemical-synthesis" } ] } ], "excerpt": "Aerosol-assisted chemical vapor deposition (AACVD) is a thin-film deposition method in which precursor solutions are atomized and carried to a heated substrate, so precursors need only be soluble, not volatile.", "snippet": "Aerosol-assisted chemical vapor deposition (AACVD) is a thin-film deposition method in which precursor solutions are atomized and carried to a heated substrate, so precursors need only be soluble, not volatile.", "node": "physical.chemistry.methods.chemical-synthesis", "markdown": "# Aerosol-assisted chemical vapor deposition\n\nAerosol-assisted chemical vapor deposition (AACVD) is a thin-film deposition method in which precursors dissolved in a volatile solvent are atomized into an aerosol, carried by a gas stream into a chemical vapor deposition reactor, and decompose on a heated substrate to form a film. Because the precursor is delivered as a liquid-derived mist, the method depends on the precursor's solubility rather than its volatility, which greatly widens the range of usable precursors compared with conventional gas-phase CVD.\n\n| Key fact | Detail |\n|---|---|\n| Delivery principle | Precursor solution atomized into fine droplets, transported by carrier gas to a heated reaction zone where droplets evaporate, decompose, and react |\n| Precursor requirement | Solubility in a volatile solvent (e.g., methanol, toluene); volatility is no longer crucial[1](https://pubs.rsc.org/en/content/articlelanding/2013/dt/c3dt50607j) • [2](https://www.sciencedirect.com/science/article/abs/pii/S1369800120313482) |\n| Typical operating range | Substrate temperatures of roughly 300–550 °C for oxides; open, atmospheric-pressure systems run from 100 to 550 °C[3](https://pubs.rsc.org/en/content/articlehtml/2026/ma/d5ma00850f) • [4](https://pmc.ncbi.nlm.nih.gov/articles/PMC10205540/) |\n| Demonstrated growth rates | Up to 800 Å min⁻¹ for copper at 140 °C (1994); ca. 100 nm min⁻¹ for fluorine-doped tin oxide (2017)[5](https://doi.org/10.1063/1.112165) • [6](https://discovery.ucl.ac.uk/id/eprint/1557783) |\n| Thickness control | From a few nanometers to microns, set by deposition time and precursor delivery[4](https://pmc.ncbi.nlm.nih.gov/articles/PMC10205540/) |\n| Products | Films, coatings, powders, composites, nanotubes, and nanowires |\n| Named variants | Aerosol-assisted combustion CVD, aerosol-assisted metalorganic CVD, ESAVD, EAAJD[7](https://www.mdpi.com/2079-6412/10/5/440) |\n\n## How it works\n\nIn conventional CVD, gaseous reagents reach the heated substrate as vapors, so each precursor must be sufficiently volatile and thermally robust to survive vaporization. AACVD removes that constraint: the precursor is dissolved in a volatile solvent and the solution is atomized into fine droplets that are swept by a carrier gas into the reaction zone.[1](https://pubs.rsc.org/en/content/articlelanding/2013/dt/c3dt50607j) There the droplets undergo evaporation, decomposition, and homogeneous or heterogeneous chemical reactions to form the desired product.\n\nSequence within a droplet: as droplets heat, the solvent evaporates and the solute may melt, sublimate, or decompose; the resulting reactants then diffuse, react, nucleate, and grow the material on the substrate.[4](https://pmc.ncbi.nlm.nih.gov/articles/PMC10205540/) Growth kinetics reflect this combined gas-and-surface process: for TiO₂ the growth rate fits \\( r_{g} \\propto T^{3/2} \\exp(-E_{A}/RT) \\), indicating limitation by gas diffusion plus surface reaction.[8](https://pubs.aip.org/aip/jap/article/98/5/054908/292105/Growth-kinetics-of-TiO2-films-deposited-by-aerosol)\n\n## How it is done\n\nA practical setup includes a flat furnace, a mobile substrate system, an ultrasonic nebulizer, a nozzle, a flow meter, and a pressure controller.[4](https://pmc.ncbi.nlm.nih.gov/articles/PMC10205540/)\n\n1. **Dissolve the precursor** in a volatile solvent such as methanol or toluene; typical concentrations are around 0.1 M.[2](https://www.sciencedirect.com/science/article/abs/pii/S1369800120313482) • [4](https://pmc.ncbi.nlm.nih.gov/articles/PMC10205540/)\n2. **Generate the aerosol** with an ultrasonic nebulizer (droplets of 1–2 µm at 1–2 MHz drive frequency for dilute solutions) or a bubbler-type atomizer.[4](https://pmc.ncbi.nlm.nih.gov/articles/PMC10205540/) • [2](https://www.sciencedirect.com/science/article/abs/pii/S1369800120313482) Published droplet-size descriptions differ: the 2006 review describes sub-micrometer droplets, while a recent protocol reports 1–2 µm droplets under its conditions.[4](https://pmc.ncbi.nlm.nih.gov/articles/PMC10205540/)\n3. **Carry the mist** to the reactor in an inert gas such as N₂ or Ar, typically at 1.5–5 L min⁻¹.[2](https://www.sciencedirect.com/science/article/abs/pii/S1369800120313482) • [9](https://pmc.ncbi.nlm.nih.gov/articles/PMC11826119/) • [4](https://pmc.ncbi.nlm.nih.gov/articles/PMC10205540/)\n4. **Deposit on the heated substrate**, usually at 300–550 °C for oxides, often at atmospheric pressure in an open system.[3](https://pubs.rsc.org/en/content/articlehtml/2026/ma/d5ma00850f) • [4](https://pmc.ncbi.nlm.nih.gov/articles/PMC10205540/) A representative oxide protocol used 0.1 M copper(II) nitrate or cobalt(II) acetate in methanol, 350 °C, 5 L/min carrier flow, and a 0.1 mm/s nozzle scan speed, giving CuO and Co₃O₄ coatings of roughly 204 and 220 nm in one step without post-deposition annealing.[4](https://pmc.ncbi.nlm.nih.gov/articles/PMC10205540/)\n5. **Control thickness** through deposition time and delivery rate; thicknesses from a few nanometers to microns are attainable.[4](https://pmc.ncbi.nlm.nih.gov/articles/PMC10205540/)\n\n## Origin\n\nThe method was reported by more than one group. A paper by Christophe Roger and colleagues in [Applied Physics Letters](https://www.edgepedia.org/applied-physics-letters) described aerosol-assisted CVD as a liquid delivery approach to copper thin films[5](https://doi.org/10.1063/1.112165), and a paper by Chongying Xu, Mark J. Hampden-Smith, and Toivo T. Kodas in Advanced Materials reported \"a new method, aerosol-assisted CVD\" used to produce crystalline silver, palladium, and binary alloy (Ag₁₋ₓPdₓ, Ag₁₋ₓCuₓ, Pd₁₋ₓCuₓ) films from thermally labile, low-volatility precursors.[10](https://doi.org/10.1002/adma.19940061005) A 2006 review by Xianghui Hou and Kwang-Leong Choy consolidated the method's definition and variants.\n\n## Variants\n\nSeveral named variants modify where energy is supplied or how droplets are charged[7](https://www.mdpi.com/2079-6412/10/5/440):\n\n- **Aerosol-assisted metalorganic CVD**: metalorganic compounds are admitted by atomization.\n- **Aerosol-assisted combustion CVD**: the aerosol is injected into a flame, supplying reaction energy externally.\n- **Electrostatic spray-assisted vapor deposition (ESAVD)**: the atomized precursor is charged with respect to the substrate, with charging simultaneous with atomization.\n- **Electrostatic-assisted aerosol jet deposition (EAAJD)**: charging and atomization are separated events.\n\n## Applications\n\nAACVD-based processes produce films, coatings, powders, composites, nanotubes, and nanowires, and CVD generally serves electronic devices, gas sensors, solar cells, window coatings, and catalytic systems.[1](https://pubs.rsc.org/en/content/articlelanding/2013/dt/c3dt50607j)\n\n- **Functional oxides and transparent conductors**: ZnO films grown at 400 °C from 0.1 M precursor showed (002) preferred orientation, 6.38 Ω cm resistivity, and 82.5% visible transparency[2](https://www.sciencedirect.com/science/article/abs/pii/S1369800120313482); fluorine-doped tin oxide reached ca. 100 nm min⁻¹ growth.[6](https://discovery.ucl.ac.uk/id/eprint/1557783)\n- **Metal and alloy films**: the founding demonstrations deposited Cu, Ag, Pd, and their binary alloys.[5](https://doi.org/10.1063/1.112165) • [10](https://doi.org/10.1002/adma.19940061005)\n- **Photoelectrodes**: bespoke dual-source Bi and V metallatrane precursors deposited phase-pure monoclinic BiVO₄ at 400 °C, the lowest reported temperature for AACVD-grown BiVO₄; pristine photoanodes delivered 1.23 mA cm⁻² at 1.23 V vs RHE and 82% peak IPCE at 674 nm.[9](https://pmc.ncbi.nlm.nih.gov/articles/PMC11826119/) AACVD-grown CoOₓ converted to CoPi by electrochemical treatment raised half-cell solar-to-hydrogen efficiency to 1.16% at 1.23 V vs RHE, versus 0.60% for photoelectrodeposited CoPi.[11](https://www.nature.com/articles/s41427-026-00641-y)\n- **MOF films**: terbium-zinc terephthalate metal-organic framework films were synthesized in situ at 170 °C under atmospheric conditions using a piezoelectric nebulizer and nitrogen carrier gas.[12](https://beta.iopscience.iop.org/article/10.1088/2632-959X/ad6835)\n\n## Limitations and alternatives\n\n**Failure modes.** Solvent choice strongly affects quality: higher-viscosity, higher-boiling-point solvents produce larger droplets that evaporate more slowly and cause greater carbon incorporation into films.[3](https://pubs.rsc.org/en/content/articlehtml/2026/ma/d5ma00850f) Solvent also dictates morphology, phase structure, transparency, conductivity, grain size, and wetting character.[3](https://pubs.rsc.org/en/content/articlehtml/2026/ma/d5ma00850f) Growth kinetics and hence uniformity depend on the precursor: the surface-reaction activation energy for TiO₂ was ≈112.0 kJ/mol for titanium n-butoxide but ≈21.4 kJ/mol for titanium diisopropoxide.[8](https://pubs.aip.org/aip/jap/article/98/5/054908/292105/Growth-kinetics-of-TiO2-films-deposited-by-aerosol)\n\n**Comparison with alternatives.** DC magnetron sputtering produces ZnO films of the highest conductivity, exceeding 350 S cm⁻¹, but its drawbacks are cost and scalability; AACVD conductivities approach those of ultrasonic spray and hydrothermal methods, making it a candidate for industrial use.[3](https://pubs.rsc.org/en/content/articlehtml/2026/ma/d5ma00850f) Relative to conventional CVD, AACVD offers high deposition rates from high precursor mass transport, easy multi-precursor injection with good stoichiometric control, and straightforward atmospheric-pressure operation that reduces pumping cost.[7](https://www.mdpi.com/2079-6412/10/5/440) For MOF films, it is an economical bottom-up alternative to layer-by-layer or sol-gel methods.[12](https://beta.iopscience.iop.org/article/10.1088/2632-959X/ad6835)\n\n**Scale-up and recent work.** A process-modeling study noted that scale-up of an AACVD process had not been studied or performed before its work, and that integration into existing transparent-conductor plants is mainly affected by flow rates, transport-system length, and deposition-site temperature.[13](https://www.sciencedirect.com/science/article/abs/pii/B9780444642417500379) Since late 2023, reported developments include using oxygen rather than nitrogen as carrier gas for [Al-doped ZnO](https://www.edgepedia.org/al-doped-zno), which improved crystallinity and conductivity and induced a Burstein-Moss shift to a higher optical bandgap[14](https://link.springer.com/article/10.1007/s43939-025-00284-w); reactive carrier gases enhance oxide crystallinity and stoichiometry while inert gases reduce side reactions and stabilize high doping levels[14](https://link.springer.com/article/10.1007/s43939-025-00284-w), along with the BiVO₄ photoanode[9](https://pmc.ncbi.nlm.nih.gov/articles/PMC11826119/) and in-situ MOF film work[12](https://beta.iopscience.iop.org/article/10.1088/2632-959X/ad6835) noted above. Detailed safety and cost data, and antimicrobial coating applications, are not covered by the published comparisons cited here.\n\n## References\n\n1. [Aerosol-assisted delivery of precursors for chemical vapour deposition: expanding the scope of CVD for materials fabrication](https://pubs.rsc.org/en/content/articlelanding/2013/dt/c3dt50607j)\n2. [Effect of precursor concentration and sintering on functional properties of ZnO thin films deposited by AACVD](https://www.sciencedirect.com/science/article/abs/pii/S1369800120313482)\n3. [The effect of solvent on the functional properties of zinc oxide films via AACVD (Materials Advances, 2026)](https://pubs.rsc.org/en/content/articlehtml/2026/ma/d5ma00850f)\n4. [AACVD system and protocol to fabricate CuO and Co3O4 nanostructured coatings](https://pmc.ncbi.nlm.nih.gov/articles/PMC10205540/)\n5. [Christophe Roger and colleagues (1994). Aerosol-assisted chemical vapor deposition of copper: A liquid delivery approach to metal thin films. Applied Physics Letters.](https://doi.org/10.1063/1.112165)\n6. [Scaling aerosol assisted chemical vapour deposition: Exploring the relationship between growth rate and film properties (Materials and Design 129, 116–124, 2017)](https://discovery.ucl.ac.uk/id/eprint/1557783)\n7. [Recent Advancements in the Use of Aerosol-Assisted Atmospheric Pressure Plasma Deposition (Coatings, 2020)](https://www.mdpi.com/2079-6412/10/5/440)\n8. [Growth kinetics of TiO2 films deposited by aerosol-assisted chemical-vapor deposition from two different precursors](https://pubs.aip.org/aip/jap/article/98/5/054908/292105/Growth-kinetics-of-TiO2-films-deposited-by-aerosol)\n9. [Precursor Development and AACVD for BiVO4 and W-doped BiVO4 Photoanodes: A Universal Ligand Approach](https://pmc.ncbi.nlm.nih.gov/articles/PMC11826119/)\n10. [Chongying Xu, Mark J. Hampden‐Smith, Toivo T. Kodas (1994). Aerosol‐assisted chemical vapor deposition (AACVD) of silver, palladium and metal alloy (Ag1−xPdx, Ag1−xCux and Pd1−xCux) Films. Advanced Materials.](https://doi.org/10.1002/adma.19940061005)\n11. [AACVD of cobalt-based co-catalysts on BiVO4 photoelectrodes for solar water splitting (NPG Asia Materials)](https://www.nature.com/articles/s41427-026-00641-y)\n12. [Tbx-Zn1-x-BDC MOF films synthesized in-situ by aerosol-assisted chemical vapor deposition (IOPscience)](https://beta.iopscience.iop.org/article/10.1088/2632-959X/ad6835)\n13. [Modelling under Uncertainty for Process Design and Scale-up of an Industrial AACVD (ScienceDirect book chapter)](https://www.sciencedirect.com/science/article/abs/pii/B9780444642417500379)\n14. [Enhanced characterization of Al-doped ZnO thin films via AACVD using oxygen as carrier gas (Discover Materials, 2025)](https://link.springer.com/article/10.1007/s43939-025-00284-w)\n\n---\n*Topic: Encyclopedia › Physical world and mathematics › Chemistry › Chemical principles and methods › Chemical synthesis*\n\n*Initially written Sep 29, 2026 · Edited: Oct 15, 2026*\n\n*Copyright 2026 EdgeChat AI, a subsidiary of Biostate AI.*\n\nLicense: Edgepedia Community License 1.0, https://www.edgepedia.org/edgepedia/license\n", "same_as": [], "url": "https://www.edgepedia.org/aerosol-assisted-chemical-vapor-deposition", "markdown_url": "https://www.edgepedia.org/aerosol-assisted-chemical-vapor-deposition.md", "license": { "name": "Edgepedia Community License 1.0", "url": "https://www.edgepedia.org/edgepedia/license", "summary": "Free with credit, commercial use included. AI training is open to everyone. For other uses, organizations over USD 100M in revenue or 100M monthly users license separately.", "spdx": "LicenseRef-Edgepedia-Community-1.0" }, "credit": "\"Aerosol-assisted chemical vapor deposition\", Edgepedia (EdgeChat), https://www.edgepedia.org/aerosol-assisted-chemical-vapor-deposition. Edgepedia Community License 1.0.", "credit_md": "\"[Aerosol-assisted chemical vapor deposition](https://www.edgepedia.org/aerosol-assisted-chemical-vapor-deposition)\", Edgepedia (EdgeChat), [https://www.edgepedia.org/aerosol-assisted-chemical-vapor-deposition](https://www.edgepedia.org/aerosol-assisted-chemical-vapor-deposition). [Edgepedia Community License 1.0](https://www.edgepedia.org/edgepedia/license).", "credit_html": "\"Aerosol-assisted chemical vapor deposition\", Edgepedia (EdgeChat), https://www.edgepedia.org/aerosol-assisted-chemical-vapor-deposition. Edgepedia Community License 1.0.", "speakable": "Aerosol-assisted chemical vapor deposition is a thin-film deposition method in which precursor solutions are atomized and carried to a heated substrate, so precursors need only be soluble, not volatile." }