Photothermal Effect From Local Surface Plasmon Resonance

Features:
When gold or silver nanoparticles absorb laser radiation of a specific wavelength, it triggers electrons in the metal nanoparticles to oscillate with the frequency of the electromagnetic field to generate heat. This creates a phenomenon known as Surface Plasmon Resonance.
This photothermal conversion allows for very rapid, localized heating with high selectivity, and is suitable for processing on a polymer substrate.

ITRI has developed the following two processing technologies :
1. Maskless Fine Conductive Line.
2. Maskless Polymer Nanostructure.

Description:
ITRI's technology has several advantages.
First, the energy consumption is low -- only 10% that of traditional technologies. The photothermal conversion facilitates localized heating and melting, so this process is suitable to make fine conductive lines on polymer substrate.
Second, it avoids highly polluting processes, making this technology both eco-friendly and cost-effective. ITRI can make silver lines with width less than 10μm to substitute for electroless copper as the seed layer for copper electroplating.

When a nano-composite of metal nanoparticles and polymers absorbs laser radiation, the exposed nanoparticles will generate heat to increase the temperature of the surrounding polymers. When the polymer's decomposition temperature is exceeded, its chemical bonds are cloven, and the polymers break down into small molecules and evaporate. In this way, nanostructure is established.

Our technology involves forming nano-composite film, then irradiating the film with a laser beam of diameter smaller than 300 nm to generate nano-holes or nano-grating of about 500 nm in width and 150nm in depth. It does not involve traditional processes like lithography, development, or etching. This technology can be applied to making low-cost film or bio-sensor.

In summary, these two new technologies can be used to form nano or micron-scale structures without lithography. They are cost-effective, eco-friendly, energy-efficient, and suitable for large-area manufacturing. In future, these technologies will offer outstanding performance in areas including electronics, biotechnology, and environmental protection.

Category:

Science & Technology

Tags:

• POPNano
• SPR
• Nano