Abstract:
The invention concerns a method for continuously producing a monomolecular film at a liquid-gas interface in a trough, by means of a barrier element (7) rotating horizontally around a vertical shaft, which barrier moves the film from a film formation compartment (4) through a connection zone (6) to a deposition compartment (5) to be deposited onto a substrate. On the opposite side of the barrier with respect to the rotational direction of the barrier element, more film forming substance is added to the liquid surface for forming a new film, which in turn is transferred by a rotating barrier element at a suitable surface pressure to elastically join the first mentioned film as an extension to the same. The invention also concerns a trough apparatus for continuously producing films.
Abstract:
A rotating transfer device for transfer of a film to a substrate at a gas-liquid interface, the rotating transfer device comprising a substrate holder holding the substrate, and a rotational positioning unit for rotating the substrate holder, the rotational positioning unit having a pivot to which the substrate holder is attached, whereby the pivot is angled between 0° and 60° to the plane of the interface surface. As a result, LB patterns with different dimensions and orientations that depend on the transfer velocity can be generated simultaneously.
Abstract:
A movable barrier and an auxiliary movable barrier are disposed inside a trough and they can be driven freely with their interrelationship kept constant. The amount of a moving monomolecular film is the same for both of them to prevent disturbance of the flow of the monomolecular film and deposition on a substrate is carried out at a uniform molecular density. The width of the substrate is the same as the length of the movable barrier or the width of the auxiliary movable barrier.
Abstract:
A rotating transfer device for transfer of a film to a substrate at a gas-liquid interface, the rotating transfer device comprising a substrate holder holding the substrate, and a rotational positioning unit for rotating the substrate holder, the rotational positioning unit having a pivot to which the substrate holder is attached, whereby the pivot is angled between 0° and 60° to the plane of the interface surface. As a result, LB patterns with different dimensions and orientations that depend on the transfer velocity can be generated simultaneously.
Abstract:
Process for producing a thin layer of at least one amphiphilic compound on a support, whereby an at least partially oriented layer of molecules of an amphiphilic compound is produced by compression and expansion at the interphase between a fluid and a polar liquid, a solid support is moved through said layer and the layer is thereby transferred onto said solid. To this end, an oriented current of the polar liquid containing on its surface the expanded amphiphilic molecules in dissolved or insoluble form is generated in a generally horizontally oriented channel and is retained by a weir which is provided at the interphase between fluid and polar liquid. The rate of flow and, if applicable, the concentration of the amphiphilic molecules are selected in such a manner that a layer of amphiphilic molecules is continually produced by compression before the weir at the interphase between fluid and polar liquid. The corresponding device comprises a horizontally oriented current channel for receiving a liquid, a weir arranged at the interphase for retaining the surface current in the channel, a device for producing a current of the liquid and a device for dipping a solid support into the channel near the weir and removing it therefrom slowly and in a controlled manner.
Abstract:
Disclosed is an apparatus for graphene wet transfer, which includes: a reservoir body having at least two reservoirs; a barrier structure located on the reservoir and having at least one separated space formed by barriers; and a substrate frame located below the barrier structure and having at least one substrate accommodation groove for accommodating a target substrate to which graphene is transferred. Here, each reservoir may be filled with a solution for a wet transfer process, and the graphene may be separately located in each separated space in a floating state in the solution.
Abstract:
In order to continuously produce an ultrathin, ordered layer of amphiphilic molecules on the surface of a polar liquid a directed flow of the polar liquid is produced in a duct which contains the amphiphilic molecules in dissolved or undissolved form on the surface in spread form. In the duct, a duct section having a relatively high flow rate on the surface and comprising a ramp which is arranged at the bottom of the duct and washed over by the polar liquid is provided. This is followed by a duct section having a relatively low flow rate on the surface, in which the flow is dammed up at an obstacle at a liquid level constant with time, so that an ultrathin, ordered layer of amphiphilic molecules is continuously formed in these duct sections at the polar liquid/air interface by compression of the flow. The washed over ramp is movable.
Abstract:
An apparatus for producing monomolecular films or monomolecular built-up films includes: a trough for accommodating a liquid over the surface of which a monomolecular film is to be spread; a barrier band for defining a region in the trough over which the monomolecular film is allowed to be spread; and a plurality of supports for holding the barrier band within the trough, the supports being arranged at positions where they do not interfere with the surface of the liquid, wherein the loss of the monomolecular film material can be substantially reduced. Further, no local collapse of the molecular film occurs in the vicinity of the supports, thereby making it possible to always provide a uniform LB film.