This Article can be Printed on a Hair
December 17, 2015 | Technical University of DenmarkEstimated reading time: 2 minutes
A nanotechnology breakthrough from DTU revolutionizes laser printing technology, allowing you to print high-resolution data and colour images of unprecedented quality and microscopic dimensions.
Using this new technology, DTU researchers from DTU Nanotech and DTU Fotonik have reproduced a colour image of Mona Lisa which is less than one pixel on an iPhone Retina display. The laser technology allows printing in a mind-blowing resolution of 127,000 DPI. In comparison, weekly or monthly magazines are normally printed in a resolution equivalent to 300 DPI.
Printing the microscopic images requires a special nanoscale-structured surface. The structure consists of rows with small columns with a diameter of merely 100 nanometres each. This structured surface is then covered by 20 nanometres of aluminium. When a laser pulse is transmitted from nanocolumn to nanocolumn, the nanocolumn is heated locally, after which it melts and is deformed. The temperature can reach up to 1,500°C, but only for a few nanoseconds, preventing the extreme heat from spreading.
The intensity of the laser beam determines which colours are printed on the surface, since the extent of column deformation decides which colour is reflected. Low-intensity laser pulses lead to a minor deformation of the nanocolumn, resulting in blue and purple colour tone reflections. Strong laser pulses create a drastic deformation, which gives the reflection from the nanocolumn an orange and yellow colour tone.
Professor N. Asger Mortensen from DTU Fotonik explains:
"Every time you make a slight change to the column geometry, you change the way it absorbs light. The light which is not absorbed is the colour that our eyes see. If the column absorbs all the blue light, for example, the red light will remain, making the surface appear red."
Page 1 of 2
Suggested Items
IDTechEx Report: Illuminating the Future of Lidar in Automotive
05/09/2024 | PRNewswireIn the rapidly evolving landscape of Advanced Driver-Assistance Systems (ADAS) and autonomous driving, sensor technologies have emerged as a pivotal force driving innovations in the automotive industry.
Shane Whiteside of Summit Reflects on Today's PCB Landscape
05/08/2024 | I-Connect007 Editorial TeamSummit Interconnect began as a printed circuit board manufacturing company just eight years ago and has seen impressive growth organically and through acquisition. Summit President and CEO Shane Whiteside takes a few moments to share his thoughts on the growing PCB industry in the United States.
BAE Systems and Eaton Expand Collaboration to Deliver Electric Drive Solutions for Heavy-Duty Trucks
05/08/2024 | PRNewswireBAE Systems, a leader in electric propulsion, and Eaton, a global power management company, are expanding their collaboration to include electric vehicle (EV) solutions for heavy-duty trucks.
Coherix Partners with EMU on 'Factory of the Future' Technology Program
05/08/2024 | PRNewswireMichigan-based Coherix is working with Eastern Michigan University (EMU) in Ypsilanti to develop "factory-of-the-future" manufacturing and assembly technology.
2024 Apple iPad Pro Estimated to Ship Between 4.5 to 5 Million Units
05/08/2024 | TrendForceApple’s recent product launch in May introduced a lineup of new tablets featuring advanced AMOLED screens. Notably, the Pro version boasts a dual-layer tandem structure designed to address the longstanding challenges of screen burn-in and lifespan that are common with AMOLED displays.