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3 results about "PDMS stamp" patented technology
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PDMS stamps are pieces of polydimethylsiloxane (PDMS), a silicone, that have been patterned usually against a master to form a relief pattern used in soft lithography. This PDMS stamp can be used in either its current form as a relief surface for techniques such as microcontact printing or can also be attached to an external source by tubing so that liquid may be passed through channels on its surface. In this second case it will often be laminated to a surface so that chemistry can be performed on that surface producing a pattern of the PDMS stamp on to the surface. Alternatively a PDMS stamp can be laminated to a second piece of PDMS to form a contained device. It is possible to pattern PDMS with nanometre resolution. PDMS stamps can be procured from some commercial sources such as Research Micro Stamps. Many techniques have been developed to modify the basic setups to perform a range of tasks such as assays on small volumes. These kinds of devices are often referred to as microfluidic devices. Because of the small dimensions of these devices flow is laminar not turbulent which can lead to many useful properties; however, this reduces the ability of fluid streams to mix.
Capillary self-assembly high-resolution quantum dot light-emitting device based on sacrifice layer and nano-imprinting and preparation method thereof
This invention discloses a high-resolution quantum dot light-emitting device based on capillary self-assembly using a sacrificial layer and nanoimprinting, and its fabrication method. The method first prepares a hole injection layer and a hole transport layer on a substrate. A sacrificial layer and a charge blocking layer are then prepared on a PDMS soft stamp. A via array is formed on the charge blocking layer, and the sacrificial layer is pressed into the top of silicon pillars, forming a quantum dot light-emitting pixel array. Next, the PDMS stamp containing the quantum dot pixels is flipped over and hot-pressed onto the hole transport layer, and the sacrificial layer is removed by selective solvent dissolution. Finally, an electron transport layer and a top electrode are sequentially prepared on the structure to complete the construction of the QLED device. This invention utilizes a soft stamp and sacrificial layer process to achieve photolithography-free, high-precision, and damage-free quantum dot pixel patterning, effectively solving problems such as low resolution, pixel color mixing, and quantum dot damage in traditional processes. It is particularly suitable for fabricating high-resolution, full-color quantum dot light-emitting diodes.
Owner:FUZHOU UNIV
A method for batch dry transfer of two-dimensional materials based on pvdc
The present application relates to a kind of PVDC-based batch dry transfer two-dimensional material method, comprising the following steps: S1.PDMS micro dome array is prepared using multistage tungsten needle array spotting method;S2.PDMS micro dome array is surface activated;S3.PVDC-based polymer solution is dropped on the surface of PDMS micro dome array, film coating is carried out using spin coater, and PVDC film is formed on the surface of PDMS after solidification, and PVDC / PDMS stamp array is prepared;S4.utilize stamp array, batch pickup two-dimensional material prepared on substrate in advance respectively, and form multilayer heterojunction array on stamp array;S5.stamp array with multilayer heterojunction array is released on target substrate, so that the batch transfer of two-dimensional material is completed.The present application has the advantages of low operating temperature, high yield, interface clean and the like, and can realize the efficient batch assembly of van der waals heterojunction.
Owner:SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
