Share this post with your colleagues
Micromechanical dry exfoliation device
The main advantages provided by the invention are: Versatility: the method is appl...
Universitat de València
From Valencia, Spain
Posted by Universitat de ValènciaResponsive2014-05-30 13:14:19 · Patents for licensing · Spain
Summary of the technology
The main advantages provided by the invention are:
Versatility: the method is applicable to any layered material and on any type of substrate.
Simplicity: the method consists in a dry exfoliation without adhesive materials.
Quality and reproducibility: the exfoliation is clean (no trace of adhesive), reproducible and it does not produce defects in the substrate.
Efficiency: it is possible to deposit a high density of atomically thin layers of the material.
Control: it is possible to control the pressure exerted, allowing for a fine-tuning of the deposition conditions depending on the nature of the layered material manipulated.
Description of the tech for sale
After the discovery of graphene, layered materials have awakened great interest among the scientific community and in industry. Atomically thin layers of these materials present unique mechanical, optical or electronic properties, opening the possibility to develop new applications. The structural features of these materials allow for the deposition of atomically thin layers on a variety of substrates. This may be achieved for instance by the micromechanical exfoliation method, also known as "Scotch tape” method. While this procedure has been widely used for the delamination of graphite, it is limited by the small amount of material obtained and its low quality and reproducibility, which has prevented the escalation of the procedure and its application as an industrial method. There are many alternative methods to the "Scotch tape" one, however most of the dry methods require specific instrumentation and are very difficult to implement in a conventional laboratory. Researchers at the University of Valencia have developed a new device for dry micromechanical exfoliation of two-dimensional materials.
Specifications
The great simplicity together with the relatively high efficiency of the micromechanical exfoliation approach has inspired the development of this device that includes remarkable improvements. The new method enables the exfoliation of layered materials on any surface in a clean and reproducible way. It does not produce defects in the substrate and it makes it possible to obtain larger areas of atomically thin layers and with higher flake density than those obtained by conventional methods. In particular, the new device is especially interesting for the exfoliation of some transition metal dichalcogenides (i.e. TaS2) which are difficult to delaminate using the traditional "Scotch tape" method.
Main advantages of its use
- See “New and innovative aspects” section
Applications
- Atomically thin layers of layered materials have many potential applications, especially in optical and electronic industries. The device is applicable to delamination and production of atomically thin layers of any layered material, highlighting the good results obtained for particular metal dichalcogenides such as TaS2. Other examples of materials that could also be delaminated are graphite, mica, layered materials with intercalation compounds, etc.
Related keywords
About Universitat de València
Public Agency from Spain
Universitat de ValènciaThe University of Valencia, founded over five centuries ago by the Juries of Valencia, is a modern European public University, open to almost all branches of knowledge: social, economic and legal sciences, Basic experimental sciences, engineering and Tehcniques, health sciences, educational sciences and the humanities.
More than 41,000 undergraduate students, 4,000 postgraduate students, 2,000 students from other universities all over the world, take classes taught by more than 4,000 professors, lectures and researchers at our campuses (more than 440.000 square meters) with the support of over 1,700 administration and service staff.
Our university community is committed to being a university of reference: we are ranked 4º in Europe in receiving Erasmus students and 5ª in sending of students (Ranking Erasmus Mobility); It is fourth spanish university in research at the international level, ranking between 201 and 300, according to Shanghai Jiao Tong University Rankings.
The University of Valencia is working in a wide range of investigative fields. The results of this activity are applied in a variety of productive sectors and social areas. Information of interest for businesses and public bodies about the Scientific and Technological Capacity of the University of Valencia is made available and offered for socioeconomic transfer through its Research Results Transfer Office (OTRI).
The OTRI is a service that manages and assesses in the generation and transfer of University knowledge towards the industry, encouraging the University role as an active agent in the economic and social development; makes easier the access to the University of Valencia research facilities; manage the intellectual property of the research results produced in the University and carry out its valorisation for efficient transfer, and offers orientation of university research groups towards the needs of Business, promoting and guiding effective relationships for exchange of knowledge applied to the needs of social and industrial environment, making easier its information dissemination and transfer.
Similar Technology Offers
xrqtc posted this:
Polymorphism Prediction in Crystal Systems of Technological InterestCurrent polymorphism studies are being carried out using one of the following three alternatives: atom-atom potentials, DFT (Density Functional Theory) calculations and ad-hoc potentials. However, all of them have serious disadvantatges. 1) with software that uses atom-atom potentials: Advantages: fast and capable of working with large molecules. Disadvantages: the "blind tests" carried out by the "Cambridge Crystallographic Data Centre" are giving a 50% maximum success in the predictions. 2) with software based on DFT calculations: Advantages: good results Disadvantages: they are computationally very slow, so they are only used for very simple molecules compared with drug molecules. In addition, they have errors predicting van der Waals interactions and weak hydrogen bridges if not corrected empirically. 3) with software using ad hoc potentials for each molecule obtained from systematic exploration of the surface potential of intermolecular interactions: Advantages: efficient and faster. Disadvantages: some potentials should be calculated for each molecule studied, which are complex and slow, and is not general. The approach presented here is new and unique because the potential Pixel has never been used before for drawing polymorphic predictions and it has shown to present the advantages of all the alternatives combined. This is the first research group which has brought the potential Pixel to this level of calculation. The potential calculations and the applicability of the methode based on pixels have the same quality that the sophisticated ab initio based potential calculations. Besides, this is much faster than DFT (Functional-Based Theory)-based and ad hoc potentials ..
Universidade de Santiago de CompostelaUniversidade de Santiago de CompostelaTechnology Transfer Office
Universidade de Santiago de Compostela posted this:
HIGH-THROUGHPUT CALORIMETRY. Thermal Microsensor with Improved Temporal and Spatial ResolutionThe prototype developed within ERC-PoC "ANTS" project, has demonstrated its sensitivity for a new concept of microcalorimeters, as well as providing advantages in microfluidics. We aim to: a) Integrate this technology within microfluidic devices or applications where size and fast response time are crucial. b) Develop a High-Throughput Calorimetry going beyond the current capabilities on ITC. > Sensing element. Ferromagnetic permalloy line 4x28 µm x 20 nm thick: affordable, miniaturization… Sensor was fabricated in a single deposition. > Temporal response. Milliseconds, to stimulus >10 microwatts; further improvements are in progress. > Easy adoption. Compatible with standard configuration of microcalorimeters. > IPR: EP, US, CN, KR, JP
SOLERBAGS Company posted this:
CORK PERFORMED , we offer a technological process to give volume to the cork, it is suitable for any market.Soler Bags Company has developed the necessary technological process to give the cork laminate textile the necessary rigidity to conform volumes. . Thus, for example, cointainers, reliefs, curved surfaces with angles of up to 90º and all types of preforms can be obtained. This process provides enormous creative potentail in products designed with cork laminate. It also provides greater rigitity to the material, improving the strenght and durability of the product.
Universidade de Santiago de CompostelaUniversidade de Santiago de CompostelaTechnology Transfer Office
Universidade de Santiago de Compostela posted this:
High Quality Thin-films (down to 4nm) by Water-based Chemical SolutionCheaper alternative, versatile, with the quality required for fundamental studies and applications. - Very high quality of epitaxial (bi)layers, down to 4 nm, comparable to PLD. - Outstanding homogeneity (over 1" substrate) and very affordable alternative to high-vacuum tech. Some examples: - Yttrium Iron Garnet (YIG) over GGG; ZnO over sapphire. - Ferroelectric BiFeO3 on LSMO. Manganites, cobaltites and their combinations - Combined with MBE, e.g. Multilevel device integrated on silicon: Small, 2017, 1701614, cover (http://doi.org/10.1002/smll.201770208).
biochemize sl posted this:
Technological platform focused on biocatalysis to perform chemical reactions capable to substitute manufacturing processes (technology needed, timing, yield, costs, risks) based on classical organic chemistry.Our biotechnology CRO designs, optimizes and develops industrial-scale bioprocesses for the production of active pharmaceutical ingredients and other molecules with high added value, by using the platform of scientific and technical biocatalysis and microbial fermentation, which has developed several novel reactions in this field are offered in chemical and pharmaceutical companies to collaborate in reducing the operating costs of their processes by applying these techniques.