Science

New color photography with high efficiency probes can super-focus white light on 6 nanometer spots

Credit: AIXabay / CC0 public domain

Scientists have developed new materials for very small next-generation electronics. Not only are they indistinguishable when crowded, but even the most powerful light microscopes do not reflect enough light to display details such as color. In an optical microscope, for example, carbon nanotubes are grayish. The inability to distinguish the details and differences of individual parts of nanomaterials makes it difficult for scientists to study their unique properties and find ways to optimize them for industrial applications.


With a new report Nature CommunicationsResearchers at the University of California, Riverside describe an innovative imaging technology that compresses lamp light into nanometer-sized spots. Just as students at Hogwarts School of Witchcraft and Wizardry are practicing the “Le Moss” spell, they hold their light at the ends of silver nanowires and use it to reveal previously invisible details such as color. To.

This advance will increase the resolution of color imaging to the unprecedented 6 nanometer level, allowing scientists to see nanomaterials in sufficient detail to make them more useful in electronics and other applications. ..

Ming Liu and Ruoxue Yan, associate professors at the Marlan and Rosemary Bourns College of Engineering at UC Riverside, developed this unique tool using superfocusing technology developed by the team.Technique is used In the previous work Observe molecular binding vibrations with a spatial resolution of 1 nanometer without the need for a condensing lens.

In the new report, Liu and Yan modified the tool to measure signals over the visible wavelength range. It can be used to render object colors and represent object electronic band structures, as well as molecular vibrations. This tool narrows the light from a tungsten lamp to silver nanowires with near zero scattering or reflection. Light is carried by the oscillating waves of free electrons on the silver surface.

The condensed light leaves the tip of a silver nanowire with a radius of only 5 nanometers in a conical path, like a ray from a flashlight. As the tip passes over the object, its effect on the shape and color of the beam is detected and recorded.

“It’s like using your thumb to control the water spray from the hose. I know how to get the desired spray pattern by repositioning my thumb. Similarly, in the experiment, I read the pattern of light. Get the details of the object blocking the 5nm size light nozzle. ”

The light is then focused on the spectrometer, where it forms a small ring shape. By scanning the probe in one area and recording two spectra per pixel, researchers can formulate absorption and scatter images in color.Originally greyish carbon nanotubes receive the first color photo and individual carbon nanotube Now you have the chance to showcase that unique color.

“Atomicly smooth, sharp-tipped silver nanowires and their near-scattering optical coupling and focusing are important for imaging,” says Yan. “Otherwise, there will be a strong stray light behind ruining the whole effort.”

Researchers hope that new technologies can be an important tool to help the semiconductor industry create uniform nanomaterials with consistent properties for use in electronic devices. New full-color nanoimaging technology can also be used to improve understanding of catalysis, quantum optics, and nanoelectronics.

Liu, Yan, and Ma were joined by Xuezhi Ma, a postdoctoral fellow at Temple University who worked on the project as part of his PhD research at UCR Riverside. Researchers also included UCR students Qiushi Liu, Ning Yu, Da Xu, Sanggon Kim, Zebin Liu, Kaili Jiang, and professor Bryan Wong.

The title of this paper is “6nm super-resolution light transmission and scattering spectroscopy imaging of carbon nanotubes using nanometer-scale white color”. Light sauce. ”


Fiber optic probes can see molecular binding


For more information:
6nm super-resolution light transmission and scattering spectroscopic imaging of carbon nanotubes using a nanometer-scale white light source, Nature Communications (2021). DOI: 10.1038 / s41467-021-27216-5

Quote: A new color photo using a high efficiency probe is a 6 nanometer spot (November 2021) taken from https: //phys.org/news/2021-11-photography-high on November 25, 2021. White light can be superfocused on 25th)-Efficiency-Probe-Superfocus-White.html

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