SUTD research study group extends 4D printing to nanophotonics


IMAGE: ( a) Various colours as printed, compressed and recuperated respectively, observed by the unbiased lens. (b) Tilted (30 ° tilt angle) and leading view of SEM images prior to and after programs and …
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Credit: SUTD

The Singapore University of Innovation and Style (SUTD) and its research study partners have actually effectively shown the four-dimensional (4D) printing of shape memory polymers in submicron measurements which are equivalent to the wavelength of noticeable light. This unique advancement has actually permitted scientists to now check out brand-new applications in the field of nanophotonics.

4D printing allows 3D printed structures to alter its setups in time and is utilized in a wide array of fields such as soft robotics, versatile electronic devices, and medical gadgets.

Various products such as hydrogels, liquid crystal elastomers and magnetic nanoparticles ingrained withstands in addition to matching printing approaches like Direct Ink Composing (DIW), Polyjet, Digital Light Processing (DLP) lithography and Stereolithography (SHANTY TOWN) have actually been established for 4D printing. Nevertheless, the product and pattern difficulties fundamental to these approaches restrict the resolution of 4D printing to ~ 10 μm at finest.

To enhance the resolution of 4D printing, the research study group established a shape memory polymer (SMP) photoresist ideal for two-photon polymerization lithography (TPL). Incorporating this freshly established withstand with TPL, they examined submicron 4D printing of SMPs at which scale the printed structures can engage highly with noticeable light. By configuring with pressure and heat, the submicron structures can change in between colourless and vibrant states (see image).

” It’s impressive that these 3D printed nanostructures have the ability to recuperate their shapes and structural colour after they have actually been mechanically flattened into a colourless, transparent state. This brand-new withstand that we have actually created permits actually great structures to be printed while still keeping their residential or commercial properties as a shape memory polymer,” stated Partner Teacher Joel K. W. Yang, primary private investigator of the group from SUTD.

” By defining the photoresist, we printed the SMPs with ~ 300nm half pitch. The resolution is an order of magnitude greater than standard high-resolution printing approaches such as DLP and SHANTY TOWN. The measurements of the structures can be easily managed by differing the printing specifications such as laser power, compose speed and small height,” included Wang Zhang, very first author and PhD trainee from SUTD.


This research study was released in Nature Communications, a multidisciplinary journal that releases premium research study from all locations of the lives sciences. .

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