摘要:
A self-assemblable polymer is disclosed, having first and second molecular configurations with the first molecular configuration has a higher Flory Huggins parameter for the self-assemblable polymer than the second molecular configuration, and the self-assemblable polymer is configurable from the first molecular configuration to the second molecular configuration, from the second molecular configuration to the first molecular configuration, or both, by the application of a stimulus. The polymer is of use in a method for providing an ordered, periodically patterned layer of the polymer on a substrate, by ordering and annealing the polymer in its second molecular configuration and setting the polymer when it is in the first molecular configuration. The second molecular configuration provides better ordering kinetics and permits annealing of defects near its order/disorder transition temperature, while the first molecular configuration, with a higher order/disorder transition temperature, provides low line edge/width roughness for the pattern formed on setting.
摘要:
Treatment of a layer comprising self-assemblable polymer at a surface of a substrate is disclosed. In an embodiment, the treatment includes arranging a zone of temperature change to sweep across the layer, wherein a temperature of the layer within the zone differs from an initial temperature of the layer prior to passage of the zone.
摘要:
A method for providing an ordered polymer layer at a surface of a substrate includes depositing a self-assemblable polymer layer directly onto a primer layer on a substrate to provide an interface between the self-assemblable polymer layer and the primer layer, and treating the self-assemblable polymer layer to provide self-assembly into an ordered polymer layer, such as a block copolymer, having first and second domain types at the interface. The primer layer is adapted to improve its chemical affinity to each domain type at the interface, in response to the presence of the respective domain type in the self-assembled polymer at the interface during the self-assembly of the self-assemblable polymer layer into the ordered polymer layer. This may lead to reduction in defect levels and/or improved persistence length for the ordered polymer layer. The method may be useful for forming resist layers for use in device lithography.
摘要:
Treatment of a layer comprising self-assemblable polymer at a surface of a substrate is disclosed. In an embodiment, the treatment includes arranging a zone of temperature change to sweep across the layer, wherein a temperature of the layer within the zone differs from an initial temperature of the layer prior to passage of the zone.
摘要:
The present invention provides for the coaxial encapsulation of a plurality of cells in a single elongated compartment. By this encapsulation, the cells are protected by at least one layer of separation material and kept in close contact, which leads to a better vitality of the encapsulated cells and consequently results in higher chances to form microtissue. Methods and devices for the production of such encapsulated cell compartments are disclosed as well as medical uses of such compartments in cell, tissue therapy and tissue engineering.
摘要:
The invention relates to a nuclear magnetic resonance imaging radio frequency—receiver (112; 216; 308; 404), the receiver (112; 216; 308; 404) being adapted to receive analogue signals from at least one radio frequency receiver coil unit (106; 200; 202; 300; 400; 402), the radio frequency receiver (112; 216; 308; 404) comprising: an analogue-digital converter (118; 226) to convert the analogue pre-amplified magnetic resonance signal into a digital signal, means (120; 230) for digital down converting the digital signal and a first communication interface (130; 252) adapted for transmitting the down converted digital signal via a communication link (e.g. wireless, optical or wire-bound).
摘要:
The invention relates to a valve for opening and closing a channel (3) of a microfluidic system, respectively. According to the invention, the valve comprises an actuation medium (2) that undergoes a volume change with changing temperature; and a heater arrangement (5) for generating a temperature gradient in the actuation medium (2) with respect to the actuation medium's (2) distance relative to the channel (3); wherein due to an expansion or a contraction of the actuation medium (2) the channel (3) is closed or opened, respectively. When the heater arrangement (5) is activated in such a way that a higher temperature is generated in the actuation medium (2) which is nearer to the channel (3) and a lower temperature is generated in the actuation medium (2) which is further away from the channel (3) the valve can be closed and vice versa. Accordingly, such a valve for a microfluidic system is provided which can be reliably actuated during a long time of use.
摘要:
The invention relates to a substrate material for analyzing fluids which has first areas with a high porosity and second areas with a lower porosity.
摘要:
A dichroic guest-host polarizer comprises an oriented polymerized liquid crystal host and aligned therewith a dichroic guest. The dichroic ratio of the polarizer is about 15 or more. The polarizer may have a small thickness, be manufactured using a wet deposition method, optionally in accordance with a desired pattern, and be provided on the inside of a liquid crystal cell. Polymerizable liquid crystals having a highly ordered mesophase which may be suitable used to obtain highly oriented polymer films such as polarizer films are disclosed.
摘要:
The present invention provides a microf luidic device, for instance for molecular sieving or for detecting a target substance in a sample fluid. The device comprises a first substrate (120) having a substantially flat first surface that is provided with first recesses (124), and a second substrate (128) having a substantially flat second surface that is provided with second recesses (130). At least some of the first recesses are filled with a porous material (114). Alternate first recesses and second recesses form a meandering channel for a sample fluid. The second recesses may be filled with a further porous material. In an embodiment, a capture substance for binding a target substance is arranged in or on the porous material.