A true-colour image containing around 8 × 105 RGB subpixels directly photopatterned using Cs2N3– capped quantum dots. Scale bar, 5 mm. Courtesy: D Talapin
Topics: Applied Physics,  Nanotechnology, Optical Physics, Semiconductor Technology, Quantum Dots, Quantum Mechanics

Photolithography is an important manufacturing process widely used in the semiconductor industry that employs photoresists (usually made from polymers) whose solubility change when illuminated with ultraviolet light. Although it is precise and can generate patterns with nanoscale resolution, it is limited in that it cannot easily pattern nanomaterials such as quantum dots (which are increasingly being used in flat-panel displays, for example). A new photoresist-free technique, developed by researchers at the University of Chicago and the Argonne National Laboratory, both in Illinois in the US, could help overcome this problem.

“Our new technique, dubbed DOLFIN (for Direct Optical Lithography of Functional Inorganic Nanomaterials) can be used to optically pattern a variety of inorganic materials, including metals, semiconductors, catalysts and magnetic materials without using photoresists,” explains team leader Dmitri Talapin. “No residual polymer-based impurities are present in the patterned layers, which means that they have good electronic and optical properties. Indeed, their conductivity, carrier mobility, dielectric and luminescence properties are on a par with those of state-of-the-art solution-processed materials.”

DOLFIN involves first preparing patternable materials in the form of nanoparticles with the desired size and shape. Next, the surface of these nanoparticles is decorated with special molecules designed to decompose when they are illuminated with UV light.

Optical lithography goes photoresist-free, Belle Dumé, Nanotechweb.org

Views: 48

Comment

You need to be a member of BlackScienceFictionSociety to add comments!

Join BlackScienceFictionSociety

Comment by Joel Braverman on August 4, 2017 at 5:49am
Hi Reginald, is there any quantum level behavior in determining if a dot is visible or not? Or is it just a name given due to the nanometer size of the dots?

Badge

Loading…

IMPORTANT ALERTS

ALERT! ALERT! ALERT! 

IF YOU ARE HAVING TROUBLE CHANGING YOUR PROFILE  PICTURE, SWITCH TO EITHER CHROME BROWSWER OR FIREFOX. THERE IS A KNOWN ISSUE WITH INTERNET EXPLORER THAT CAUSES TROUBLE CHANGING PICTURES.


PLEASE DO NOT SIGN IN WITH FACEBOOK IF YOU ALREADY HAVE AN ACCOUNT. YOU WILL CREATE A DUPLICATE THAT WILL NOT HAVE YOUR INFO CONNECTED. THANKS

NO SPAMMING

Please do not greet everyone on the site with large images and/or announcements of your book or business. Yes, you want to tell the world, but learn the fine art of subtlety. We have lost numerous members because of the amount of 'friend' mail they instantly receive. This Hurts Everyone.

Also, DO NOT post the same information multiple times throughout the site. It will be deleted without notice.

 

Spam is unsolicited advertising, whether it is posted as comments on other members' pages or is emailed for marketing purposes.

 

Please be considerate. Post your advertisement in the proper Articles/Forum or Group. There are inexpensive marketing channels that reach every member for just $25 on the Advertising tab. You can post your information on your profile and even update your blog as often as you like.

 

We are not into censorship, so please don't make us ask you to leave. Be kind and unselfish - don't spam.

 

Your Account Will Be Deleted Without Warning For Spam.

 

Blog Posts

E-Fields, Nuclear Spin, Qubits, Silicon...

Posted by Reginald L. Goodwin on August 22, 2017 at 5:19am 0 Comments

Photograph of a sapphire wafer that is patterned with the photonic bandgap resonators used in this work. It shows two full devices and parts of four others. Before using them in experiments they are cut out of the array and wired up. The devices themselves are about 1 cm long. The serpentine structures are microwave Bragg mirrors and the straight lines of varying width at the center of each device are the microwave cavities. Courtesy: A Sigillito…

Continue

Solar Eclipse 2017...

Posted by Reginald L. Goodwin on August 21, 2017 at 5:30am 0 Comments

Image Source: NASA.gov

Topics: Eclipse, NASA, Space, Space Exploration

The good news: The eclipse glasses I ordered from Amazon are on the approved NASA list (see Friday's post).

The bad news:…
Continue

Watch Black Suns: An Astrophysics Adventure This Weekend!

Posted by JC Holbrook on August 18, 2017 at 10:23pm 0 Comments

PRESS RELEASE

Total Solar Eclipse African American Style: Black Suns: An Astrophysics Adventure



Black Suns: An Astrophysics Adventure, a documentary about chasing eclipses and science dreams, chronicles the lives of two globe-trotting astrophysicists, Dr. Alphonse Sterling and Dr. Hakeem Oluseyi, as they follow/document the two solar eclipses that occurred in 2012. The film is hosted by award-winning cultural astronomer Dr. Jarita Holbrook. Black Suns premiered on Friday, June 9 at the 7th Annual Art of Brooklyn Film Festival, where it won the Jury…

Continue

Eclipse Caveats...

Posted by Reginald L. Goodwin on August 18, 2017 at 6:30am 0 Comments

Image Source: See link [2] below

Topics: Astronomy, Astrophysics, Eclipse, Moon, NASA

Usually I do something about current events, but I will admit to you some exhaustion since Monday's Appomattox post and Tuesday's…
Continue

The Digital Brothers Multimedia

The Digital Brothers
Our goal is to provide cost effective technological solutions for home, small and big business. After over 20 years of service working in this field, we decided to utilize our talents to develop and cultivate our own vision to benefit the community.
2D & 3D Animation
Graphic & Web Design
Photo & Video
Multimedia Development
Online & Print Marketing

Contact Us Today To Assist In Your Business Success
Website: www.TheDigitalBrothers.com
Email: info@thedigitalbrothers.com

SKYCITY TALKRADIO

THE UNDERGROUND BY ROXANNE BLAND

Life as alpha of a werewolf pack is anything but predictable. But even Parker Berenson is surprised by the latest twist: he’s fallen in love with a space alien. Problem is, he suspects Melera, his sexy new flame, might be the serial killer terrorizing Seattle. Or maybe she isn’t. After all, just because she’s an interstellar assassin doesn’t mean she’s guilty.

http://blackrosepress.com/

© 2017   Created by Jarvis Sheffield - Admin.   Powered by

Badges  |  Report an Issue  |  Terms of Service