From dot-matrix to 3-D, printing technology has come a long way in 40 years. But all of these technologies have created hues by using dye inks, which can be taxing on the environment. Now a team reports in ACS Nano the development of a colorless, non-toxic ink for use in inkjet printers. Instead of relying on dyes, the team exploits the nanostructure of this ink to create color on a page with inkjet printing.
Current technologies blend dyes — think CMYK or RGB — to print in color. But these substances can harm the environment. Some dyes are toxic to marine life or can react with disinfectants like chlorine and form harmful byproducts. An alternative to dyes involves changing the nanostructure of materials so that they reflect light in particular ways. An example of this kind of coloring by light interference is found in nature: Squids can modify the nanostructure of their skin to mirror back their surrounding environment, creating a natural camouflage. Previous research has investigated printing color by light interference, but these attempts have required high-temperature fixing or specialized printing surfaces.
Aleksandr V. Yakovlev, Alexandr V. Vinogradov and colleagues at ITMO University wanted to develop a nanostructure color printing technology that is “greener” and can be printed on a wide variety of surfaces.
The team found that a colorless titanium dioxide-based colloidal ink was the best suited for the job. It does not require high temperature fixing and can be deposited on many surfaces. The researchers can control the color produced on surfaces by varying the thickness of ink deposition from a normal inkjet printer. Creating a vibrant color red with this method and this very narrow angle of coloring remains a challenge.
This method, however, has generated the first reported “green” ink that is both safe for the ecosystem and does not fade from UV exposure, the researchers say.
The Latest on: Nanostructure color printing
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The Latest on: Nanostructure color printing
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- Transparent 3D printable nanostructures can mimic natural colors on August 21, 2018 at 12:26 am
Advanced 3D printing technologies ... A free-form structure The design tool permits users to enter their desired color, then replicates it through a 3D model nanostructure pattern rather than attempti... […]
- Colorless ink produces multiple colors when printed on February 16, 2018 at 4:00 pm
Such "nanostructure inks ... the surface to appear to be a given color. Previous attempts at creating these inks have required either a high-temperature fixing process, or they've had to be applied to ... […]
- Better, bolder printing with silicon nanostructures on November 8, 2017 at 6:15 am
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- 3D Printing Reveals Nanostructures That Create Color in the Blue Tarantula on November 23, 2016 at 8:18 am
This method of creating color has been of interest for some time, but it is only with the development of 3D printing technology that it appears ... accident with a dye vat but because of a built-in na... […]
- Multiple Ink Nanolithography: Toward a Multiple-Pen Nano-Plotter on September 9, 2016 at 7:03 pm
An “overwriting” capability of DPN allows one nanostructure to be generated and the areas ... are analogous to the transition from (single ink) conventional printing to “four-color” printing, and shou... […]
- Nanostructure design enables pixels to produce two different colors on June 23, 2015 at 5:00 pm
A pixel can be encoded with two different colors from a wide color palette using nanostructure arrays illuminated with ... background colors that minimized cross-talk. "Being able to print two images ... […]
- Researchers Create the World’s Smallest Stereoscopic 3D Color Prints Using Nanopixels on November 21, 2014 at 10:39 am
Researchers have been working on the area of color 3D printing — with stereoscopic microprints ... which affect the polarization and resonance of the nanostructure. They also noted that with other sha... […]
- A large-scale diffractive glasses-free 3D display on October 27, 2014 at 11:02 am
and flexibility in nanostructure patterning. Figure 3 shows the 3D image viewed at an angle of 50° to the plane, with the viewpoint ranging from left to right. The 3D image exhibits vivid color and si... […]
- Can You Tell the Monet From the Microscopic Imitation? on July 2, 2014 at 2:20 am
The other is a replica, constructed using an aluminum nanostructure, measuring around 300 microns in width. But can you tell which is the real deal? Printing, at whatever ... Well, they chose to esche... […]
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