Exone end to end binder jetting service

Bubble Printing: Texas Researchers Develop New 3D Printing-like Method to Fabricate Quantum Dots

Metal Parts Produced
Commercial Space
Medical Devices

Share this Article

Semiconductor quantum dots are used in a number of applications, including light-emitting devices, displays and sensors, thanks to their properties of tunable fluorescence wavelength, narrow bandwidth and high brightness. Most of those applications require the dots to be very precisely patterned with targeted properties on solid substrates. Unfortunately, typical direct-write printing methods such as inkjet and gravure printing are limited in their resolution and structural complexity, as well as requiring a lot of post-processing time.

A group of researchers led by Professor Yuebing Zheng from the University of Texas at Austin has developed a new method of quantum dot patterning, and it’s similar to 3D printing. It even has a great name – it’s called bubble printing.

“Bubble printing technique is a direct-print technique which uses a microbubble generated using low-power laser beam to pattern nanoparticles on a substrate,” University of Texas at Austin graduate student Bharath Rajeeva tells 3DPrint.com. “This is similar to 3D printing, wherein the patterns are defined based on the movement of a either a laser beam/nozzle. However, our bubble printing technique is focused on gaining higher resolution and fabricating patterns at the nano/micro scale.”

The research was published in a new paper entitled “High-Resolution Bubble Printing of Quantum Dots,” which you can access here. The bubble printing technique allows for quantum dots to be precisely patterned on plasmonic substrates with submicron resolution of greater than 700 nm linewidth and strong adhesion. It also allows for the dots to be printed on flexible substrates and can be integrated with smartphones to realize haptic integration.

The technique works by using a single low-powered laser beam to generate a sub-micron-sized bubble at the interface of a colloidal suspension of nanoparticles and a plasmonic substrate containing a network of metallic nanoparticles. The bubble captures and freezes the nanoparticles on the substrate, and different patterns can be created depending on the movement of the stage. By using a smartphone, free-form macroscale movements can be created and replicated at the nanoscale.

The advantages of the technique are many. Specialized inks are not required, and issues such as nozzle clogging, ink spreading, and excessive post processing time don’t exist. The technique also opens doors to many applications, as well.

“We have demonstrated anti-counterfeiting application via fabrication of micro-scale QR code (80 µm×80 µm),” the researchers state. “The generality and simplicity of bubble printing along with its flexible substrate compatibility enables the fabrication of multiple functional devices such as ultra-high resolution displays, multi-sensor integration at nano/micro scale, and nanolasers. In addition, the haptic-integration can advance research and education in nanoscience and nanotechnology.”

Further work will research other nanoparticle systems for applications such as colloidal nanosensors, flexible LED microdisplay devices, and colloidal waveguides. Additional applications could include flexible electronics, flexible photonics and even biological applications. The key challenges to be overcome at the moment are improving the roughness of the lines and maintaining the bubble stability over centimeter-scale areas.

“The scientific core of our finding is the stable bubble-mediated immobilization at the submicron scale, and the ability to maintain the submicron-sized bubble’s stability over a large area,” the researchers explain. “Our work circumvents the barrier of achieving a widely applicable, high-throughput and user-friendly printing technique in the submicrometer regime, along with simultaneous fluorescence modification capability.”

Authors of the research paper include Bharath Bangalore Rajeeva, Linhan Lin, Evan P. Perillo, Xiaolei Peng, William W. Yu, Andrew K. Dunn, and Yuebing Zheng. Discuss in the Bubble Printing forum at 3DPB.com.

 

Share this Article


Recent News

3D Printing Webinar and Event Roundup: October 24, 2021

3D Printing News Briefs, October 23, 2021: Business & Software News



Categories

3D Design

3D Printed Art

3D Printed Food

3D Printed Guns


You May Also Like

Could 3D Printed Metal Made With Scrap Material Solve Our Aluminum Problems?

The additive manufacturing division of 6K Inc, 6K Additive, has purchased the Pennsylvania company Specialty Metallurgical Products (SMP), a specialist in producing titanium and zirconium tablets for the metal alloys...

Redefine Meat Snaps Up Former Nestlé and Unilever Executives

Israel-based 3D printed animal-free meat developer Redefine Meat has appointed former Nestlé and Unilever executives ahead of the European commercial launch of its series of five “New-Meat” products in November 2021....

3D Printing Webinar and Event Roundup: October 17, 2021

We’ve got several multi-day conferences to tell you about in this week’s roundup, along with webinars on topics ranging from semiconductors and bioprinting to digital dentistry and more. Read on...

Featured

French Hospitals to Perform Medical 3D Printing On-Demand with Stratasys

Stratasys signed a deal with French med-tech startup Bone 3D to provide 3D printing technology to local hospitals. This cooperation is part of Bone 3D’s HospiFactory initiative, equipping healthcare institutions...


Shop

View our broad assortment of in house and third party products.