67 results about "PDMS stamp" patented technology

The invention discloses a device and a method for establishing single-cell level connection between neurons; the device comprises a basement whose upper surface is provided with protein band, and the region outside the protein band at the basement is covered by a polyether F127 layer; a PDMS stamp which is covered to the upper surface of the basement and whose lower surface is provided with a micro-groove unit; the micro-groove unit comprises: a linear type intermediate groove and at least one linear type side groove which is arranged at the left side or/and the right side of the intermediate groove, the middle section of the side groove does not intersect with the intermediate groove, and two end sections outside the middle section of the side groove incline to the direction away from the intermediate groove; the groove end is provided with a vertical hole channel; the protein band intersects with the groove without superposition; neurons are sent into the channel and only adhere to the protein band, the neurite directionally grows along the protein band without branching, thereby obtaining single-line connection of neuron single-cell level; the structure is simple, the operation is easy, and the orderly growth of the neurite can be controlled, and the electrical signal transduction between the neurocytes can be precisely studied, furthermore, the invention provides foundation support for manufacturing of bio-sensors.

The invention discloses application of a zinc phthalocyanine complex as ink in micro-contact printing. The 2-propyl alcohol solution of 8(Octanohydroxamic)-zinc phthalocyanine serves as micro-contact printing ink; the pattern of a Polydimethylsiloxane (PDMS) seal is transferred to the surface of carboxylation polyethylene terephthalate, polyethylene naphthalate or polyimide substrate; and a delicate metal pattern is obtained on the substrate with a chemical plating method. The application of the zinc phthalocyanine complex as the ink in the micro-contact printing has the beneficial effect that the common phenomena of pattern inflation and pattern torsion in the micro-contact printing can be reduced by the phthalocyanine metal complex ink, and the phthalocyanine metal complex ink has a lowpreparation cost and great potential in the industrial application and is stable.

A preparation method for a tissue engineering transplant with a micro-nano topological geometry structure on the surface includes 1), preparing a silicone rubber seal with a micro-nano topological (three-dimensional) geometry structure pattern on the surface according to a micro molding method; 2), spraying a metal conducting nano-coating with the thickness of 50-100nm on the surface of the silicone rubber seal according to an ion sputtering method; 3), electrically spinning a natural or composite biological material solution onto the surface of the PDMS seal by an electrospinning technique toform a biological material support; 4), separating the spun biological material support from the PDMS seal to obtain the tissue engineering transplant with the micro-nano topological geometry structure on the surface. The preparation method has the advantages that the micro molding technology and the electrospinning technique are applied jointly, the spun biological material support is separatedfrom the PDMS seal easily, and the preparation method is simple and easy to operate and suitable for mass production.

The invention discloses an application of a double-layer sandwich-type Eu metal phthalocyanine complex in microcontact printing. The double-layer sandwich-type Eu metal phthalocyanine complex is bis(phthalocyanine) complexing Eu, and a metal pattern is obtained on a polytetrafluoroethylene substrate by virtue of a chemical plating method by taking a dichloromethane solution of the bis(phthalocyanine) complexing Eu as a printing agent of microcontact printing and transferring the pattern of a PDMS (Polydimethylsiloxane) seal to a carboxylation polytetrafluoroethylene substrate. According to the application, the fine metal patterns can be obtained by carrying out microcontact printing on the surface of the polytetrafluoroethylene substrate commonly used in an electron industry by taking the dichloromethane solution of the bis(phthalocyanine) complexing Eu as ink, so that the common phenomena of pattern expansion and distortion during the microcontact printing are effectively decreased, and the distinguishability is enhanced.

The invention discloses a device and a method for arranging a plurality of cells at the same plane and controlling the cells, comprising: a thin film with micro-hole arrays which is located at the upper surface of a base; a PDMS stamp whose lower surface is provided with a micro-groove unit and is coated on the thin film; the micro-groove unit comprises: an intermediate groove and a left-side groove and a right-side groove which are located at the left side and the right side of the intermediate groove; the middle sections of the left-side groove and the right-side groove are parallel to the intermediate groove; the both end sections except for the middle sections of the left-side groove and the right-side groove slant towards the direction away from the intermediate groove; the end of the groove is provided with a vertical through hole which is communicated with the corresponding groove; the holes of the thin film are all located in the micro-groove of the stamp; and a micro-pipeline is provided with different cell suspensions, the cell grows in the micro-pipeline and adheres to the micro-pipeline; the stamp is removed to realize the co-culture of a plurality of cells at the same plane; and then the thin film is removed to realize the free movement of the plurality of co-cultured cells at the same plane; the method is simple to operate, the used material is cheap, and the invention can be used for high-throughput screening of useful drugs for cells.

The invention discloses a preparation method for a flexible carbon-nanotube field effect transistor, and belongs to the field of semiconductor manufacture. A silicon substrate is provided, and carbon nanotubes are prepared on the silicon substrate; a field effect transistor taking the carbon nanotube as channel materials is prepared; trenches are formed in the periphery of the carbon-nanotube field effect transistor, and bridging of preset size is reserved in the adjacent end points of the trenches; the silicon substrate is etched horizontally, so that the bottom of the carbon-nanotube field effect transistor is suspended; and a PDMS stamping technology is used to transfer the carbon-nanotube field effect transistor to a flexible substrate to form the flexible carbon-nanotube field effect transistor. Mainstream preparation technologies of the high-performance carbon-nanotube transistor are combined, large-scale production of the flexible carbon-nanotube field effect transistors is realized by integrating the flexible packaging technology, and the market and application values of the method are high.

The present invention discloses a method for fabricating polymeric wavelength filter based on an asymmetric Bragg coupler with single-grating waveguide. The asymmetric waveguide coupler is formed firstly on a negative photo-resist mold. PDMS film is injected into the narrow waveguide of the coupler to act as a protection layer. The gratings pattern is exposed on the alternative waveguide and subsequently transferred to PDMS stamp mold. The PDMS stamp mold is used as a stamp to transfer the gratings pattern of the ABC wavelength filter onto UV cured polymer to form the final ABC filter. Whereby, the fabrication process is reliable and accurate, and can offer great potential for mass production of the ABC filter with single-grating waveguide.

The invention discloses a preparation method for micro-sized and graphical ZnO nanowire arrays by adopting two steps of micro-contact printing (MCP) and low-temperature chemical bath deposition (CBD). The preparation method includes: firstly, adopting a sol-gel method to prepare a ZnO seed layer film on conductive glass; transferring TiO2 sol ink to the ZnO seed layer film through elastic polydimethylsiloxane (PDMS) stamps with different graphics to acquire a graphical TiO2 shielding layer film; adopting a chemical bath deposition method to complete select growth of ZnO nanowires in a ZnO seed layer area shielded by the TiO2 film. The preparation method is simple in process, low in cost, large in preparation area and good in repeatability; the three critical techniques in the entire process refer to preparation of the TiO2 sol ink with appropriate viscosity, setting of inkiness of the PDMS stamps and pressure parameter of the printing process and time control of hydrothermal growth of the nanowires.

The invention provides a method of etching the surface topography of polydimethylsiloxane (PDMS) by oxygen plasmas. The method comprises the steps of placing a prepared PDMS stamp in an oxygen plasma atmosphere, and etching the PDMS stamp to obtain a surface microstructure. Moreover, a method of preparing a CD surface microstructure with a regular microstructure is introduced in details. According to the method provided by the invention, the oxygen plasmas are used for etching the PDMS stamp with the surface microstructure, which is obtained by a replica moulding technology, and the height of the microstructure of the PDMS stamp is accurately regulated and controlled by changing the etching time of the oxygen plasmas. The technology is low in cost, high in accuracy, simple and convenient to operate, and wide in application range; the topography height of the PDMS stamp is regulated and controlled by the oxygen plasmas under a condition of no change on the topography of the PDMS stamp; the microstructure prepared by the method provided by the invention has wide application prospects in many fields of optics, microelectronics, sensors, biomedicine and the like.

The invention discloses a method for preparing a patterned agarose stamp, wherein the method comprises the steps of fluorinating a polydimethylsiloxane (PDMS) stamp with patterns at room temperature, casting aqueous agarose solution to the fluorinated PDMS stamp with the patterns at room temperature, increasing the temperature to 80 to 90 DEG C, keeping the stamp for a while, taking out the stamp, cooling the stamp to the room temperature and removing solated agarose which is peeled from the PDMS stamp, so as to obtain the agarose stamp with the patterns. The agarose stamp is clear in pattern and large in pattern area and can be preserved for a long time.

The invention provides an electronic device based on an SOI CMOS, a preparation method and a peeling method thereof. The electronic device based on the SOI CMOS is provided with a plurality of peelingtroughs. The peeling troughs penetrate through the electronic device based on the SOI CMOS. Not only is manufacture of the electronic device based on the SOI CMOS facilitated, but also a stress in bending is reduced. Damage of the electronic device based on SOI CMOS is prevented. Through arranging the peeling troughs and arranging the peeling troughs which are trough to an embedded oxide layer, and performing corrosion processing on the embedded oxide layer, corrosion of the embedded oxide layer is realized; and furthermore the electronic device based on the SOI CMOS is disengaged from a substrate. The electronic device based on the SOI CMOS forms a suspended structure through supporting by a support. Manufacturing process difficulty and manufacturing cost are reduced. The electronic device is peeled to a target substrate through a PDMS stamp.

The invention belongs to the field of semiconductor manufacture, and discloses a preparation method of a flexible semiconductor device. The method includes: firstly, an inorganic semiconductor film is grown on an inorganic semiconductor substrate, then a semiconductor device based on the inorganic semiconductor film and an isolation medium layer are prepared, a groove is then etched so that the bottom of the semiconductor device maintains suspended, and finally the semiconductor device is transferred to a flexible substrate via a PDMS seal technology. The method is completely compatible with the current mainstream microelectronics technology, and the performance of the device can be effectively guaranteed via the semiconductor device prepared based on inorganic semiconductor materials; besides, the method can be widely applied to the preparation of flexible semiconductor devices of different kinds, such as light emitting diodes (LED) or field effect transistors (FET), the method can even be directly applied to the realization of flexible circuits, batch production of flexible circuit chips can be realized via the integration of the flexible packaging process, and the application values are very important.

The invention belongs to the field of integrated optics, and in particular relates to a method for integrating a garnet film on silicon at low temperature based on transfer printing. In the method provided by the invention, closely arranging PS globules at six corners of a SiO2/Si substrate by using a chemical self-assembly method, the PS globules are bombarded by oxygen plasma to reduce the diameter, the magneto-optical garnet film is deposited on the PS globules that are bombarded by the oxygen plasma at room temperature by using a pulse laser deposition method, the PS globules are cleaned with methylbenzene to remove the PS globules and the garnet film on the PS globules, so that the garnet film with holes are reserved on the SiO2/Si substrate, and finally the etching speed is greatly improved, and the HF corrosion degree of the garnet film is reduced. After etching is completed, the suspended garnet film is taken down by using a PDMS seal, and then printed on the silicon substrate,and thus the low-temperature integration of the garnet film on the silicon substrate is achieved.

Disclosed is a silver nanowire patterning method including patterning an adhesive conductive polymer thin-film on a substrate, fabricating a polydimethylsiloxane (PDMS) stamp coated with a silver nanowire thin-film, and bonding the substrate patterned with the conductive polymer thin-film to the PDMS stamp coated with the silver nanowire thin-film and then separating the two bonded substrates.

The invention belongs to the technical field of electron transport layer QLED preparation, and particularly relates to a method for preparing a perovskite QLED electron transport layer by transferring a ZnO nano-film through a dry process. The method comprises the following steps: preparing a layer of ZnO nano-film on an auxiliary substrate, attaching a pre-prepared viscous elastomer PDMS to the ZnO nano-film, adsorbing the ZnO nano-film by utilizing the viscosity of the elastomer PDMS, and separating PDMS/ZnO from the auxiliary substrate; and annealing to weaken the viscosity of the PDMS stamp, attaching PDMS/ZnO to a perovskite quantum dot light-emitting layer, pressing, transferring ZnO nanoparticles to the perovskite layer, and finally separating the PDMS stamp from the ZnO layer. According to the invention, the ZnO nano-film is transferred to the perovskite quantum dot light-emitting layer through the PDMS stamp to be used as an electron transport layer, so that a perfect heterogeneous interface can be constructed, and the perovskite quantum dot light-emitting layer can be prevented from being damaged by a solvent effect in solution addition or a heat effect of a vacuum process.

The invention relates to a preparation method and application of a polyelectrolyte compound with a stress response and a patterned micro-nano structure, in particular to a preparation method and application of the polyelectrolyte compound. The invention aims to solve the problems that an existing humidity sensor is expensive, and a compound sensor cannot realize industrial production and is not provided with relative humidity, acidity and other detection indexes. The preparation method comprises the following steps of (1) preparing a patterned PDMS stamp; (2) preparing the polyelectrolyte compound; (3) pressurizing, keeping warm and transferring to obtain the polyelectrolyte compound with the stress response and the patterned micro-nano structure. The polyelectrolyte compound with the stress response and the patterned micro-nano structure is used as an intelligent super perspective material and a stress responsive scattering medium for application, is used for detecting life food quality, and is used for a humidity sensor. According to the preparation method provided by the invention, the polyelectrolyte compound with the stress response and the patterned micro-nano structure can be obtained.

The invention designs a micro-nano-scale speckle manufacturing method. The method comprises the steps of generating multiple simulated speckle patterns with different particle sizes and numbers by using computer software, selecting an optimal simulated speckle pattern from the simulated speckle patterns, converting the speckle pattern into a binary pattern, and printing the speckle binary patternon a plastic polymer sheet to be used as a mask; and then obtaining a mother board with speckles through etching, curing the chemical prepolymer of the seal material PDMS in the mother board, droppingoff the chemical prepolymer from the mother board after polymerization molding to obtain a PDMS seal, enabling the PDMS seal to contact a gasket containing ink, and pressing the PDMS seal which has been soaked in the ink on a surface of the gold-plated to-be-detected object to obtain the to-be-detected object with the speckles. The method disclosed by the invention has the advantages of being simple and quick in manufacturing, convenient to operate, low in cost and efficient in batch.

The invention relates to a rare earth Tb complex and further provides application of a compound solution of the rare earth Tb complex and gamma-cyclodextrin in the microcontact printing technique. The application comprises the steps of dissolving gamma-cyclodextrin into water, so as to obtain a 3g/L-6g/L gamma-cyclodextrin water solution, adding 0.8g of rare earth Tb complex into each liter of the gamma-cyclodextrin water solution, regulating the frequency at 20kHz, carrying out ultrasonic treatment for30-60 minutes by virtue of an ultrasonic instrument, so as to obtain the uniformly-dispersed compound solution of gamma-cyclodextrin and the rare earth Tb complex, soaking a PDMS stamp into the compound solution, covering a carboxylation substrate with the PDMS stamp, and carrying out chemical plating. According to the application, a metal pattern is prepared on polymer substrates frequently used in the electron industry by virtue of microcontact printing ink, and a new thought is provided for the microcontact printing industry.

The invention discloses application of a compound solution of beta-cyclodextrin and a rare earth Dy complex in microcontact printing. According to the application, the compound solution of beta-cyclodextrin and the rare earth Dy complex is taken as a printing agent of the microcontact printing, a pattern of a PDMS stamp is transferred to a polyethylene glycol terephthalate substrate, a fine metal pattern is prepared on the polyethylene glycol terephthalate substrate by virtue of a chemical plating method, and a metal pattern is prepared on the polyethylene glycol terephthalate substrate frequently used in the electron industry by taking the compound solution of beta-cyclodextrin and the rare earth Dy complex as microcontact printing ink. According to the application, a new thought is provided for the microcontact printing industry.