Rubik's Cube® used by permission of Seven Towns Ltd. www.rubiks.com

Silica films were grown from DADBS with different thicknesses.

Gold nanoparticle films 0.5g/min -> 2g/min

0.25g/min

Nanoparticle deposition by a direct liquid injector CVD system B. De Roo1*, M. Vervaele1, M. Rajala2, H. Guillon3 and J.P. Locquet1

1 Department of Physics and Astronomy, KU Leuven, Leuven, Belgium 2 DCA Instruments Oy, Finland

3 Kemstream, France * contact: bert.deroo@fys.kuleuven.be

We present a novel deposition system for the deposition of nanoparticles in a controlled and reproducible way. This system is based on a chemical vapor deposition system which makes use of two direct liquid injectors to deliver nanoparticles into a vacuum system. By changing the

deposition parameters we could obtain a thin layer of gold nanoparticles. We could vary the appearance of these nanoparticles by changing the deposition parameters.

We have grown gold nanoparticles films with different gold nanoparticles flow speeds. By changing the flow speed we could control

the aggregation state of nanoparticles and with a flow 0.25g/min we could obtain well dispersed nanoparticles on a silica substrate.

Goal and concepts Results

Conclusions

Deposition of premade nanoparticles

Better control on size and dispersity

Density control

Vaporization of nanoparticles dipersion

Functionlization possible

Multi-possibilities of solvent

System Direct liquid injector

We like to thank the EU for their support through the FP7-grant SNOWCONTROL project (263510). Project website: fys.kuleuven.be/vsm/snowcontrol. JWS thanks the Flemish Hercules stichting for its support in Her/08/25. We would also like to thank the EU for their support in the COSMOPHOS project and the MODENPTOX project.

Setup

Silica substrate

NP thin film

0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.02Theta (°)

3

1

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0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.02Theta (°)

5

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Thickness (nm) Degree (°C) Time (min)

solution flow (g/min)

4.8 600 15 0.2

↓ t 9.5 600 25 0.2

23.1 600 50 0.2

Thickness (nm) Degree (°C) Time (min)

solution flow (g/min)

9.4 600 25 0.2

↑ T 4.7 550 25 0.2

3.8 500 25 0.2

1.0 2.0 3.0 4.0 5.0 6.0 7.02Theta (°)

2

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1000000

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Inte

nsity (

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Gold nanoparticles in cyclo-hexane