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You won’t believe how tiny the world’s smallest Mona (Micro) Lisa is. An incredible ‘molecular painting’ of the famous painting that is three times narrower than a Human Hair! Nanotechnique creates image 30 microns in width.

Georgia Tech researchers have created the “Mini Lisa” with an atomic force microscope and a process called ThermoChemical NanoLithography (TCNL).

The Georgia Tech team positioned a heated cantilever at the substrate surface, going pixel by pixel, to create a series of confined nanoscale chemical reactions.

This new technique could be used in nano-manufacturing of devices.

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Jennifer Curtis, an associate professor in the School of Physics and the study’s lead author, said:

“By tuning the temperature, our team manipulated chemical reactions to yield variations in the molecular concentrations on the nanoscale. The spatial confinement of these reactions provides the precision required to generate complex chemical images like the Mini Lisa.

We envision TCNL will be capable of patterning gradients of other physical or chemical properties, such as conductivity of graphene.
This technique should enable a wide range of previously inaccessible experiments and applications in fields as diverse as nanoelectronics, optoelectronics and bioengineering.”

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via dailymail

source Georgia Tech