Physics & Technology

Vertical Electrolyte-gated Organic Transistors

This innovation presents a novel nanoscopic device design based on a vertical transistor structure that enables electrolyte-gated organic semiconductors to drive MA cm^-2 currents combined with on/off ratios of 10⁸.

Manufacturing process for a quick starting Solid Oxid Fuel Cell (SOFC)

For the energy revolution, fuel cells play a key role for future energy systems. Presented here is a manufacturing process for a robust, quick-starting MFS-SOFC that can be run at lower temperatures.

New plasma device to treat hair loss

Scientists at the HAWK in Göttingen, Germany developed a new brush-like plasma device for chemical-free treatment of the scalp to promote hair growth. The small device is easy to handle and can significantly enhance microcirculation as well as oxygen saturation, which are key parameters for stimulating hair growth.

CRISTAL - sample embedding for correlative microscopy

CRISTAL represents a novel biological sample embedding procedure that is based upon UV-curable resin that both fixes the specimen while simultaneously adjusting the refractive index. Additionally, the procedure further allows histological, electron microscopy or molecular biological analyses of embedded samples.

Measuring head for plasma-aided material analysis

Presented here is a novel measuring head for non-destructive material testing that works without a counter electrode at the sample due to clever electrode placing and reduced plasma energy due to its specific plasmajet layout. Thus allowing non-destructive analysis of virtually all material surfaces and shapes.

Improved method for alignment and sorting of cells in flow cytometry

Here we present two new methods for flow cytometry and fluorescence-activated cell sorting. Both methods are suitable for the so-called 'sexing' of spermatozoa as well as for many other applications of fluorescence-activated cell sorting and impose less stress on the sorted material than conventional techniques.

Raman Refractometer Analyser Tool

The following invention represents a possibility to identify infusions when administered by an injection pump. The method involves a combination of Raman spectroscopy and refractometry. Both methods of analysis are based on instrumental analysis. Furthermore, algorithms are used for the evaluation which can be assigned to indirect hard modelling and statistics.

Novel technology to predict iron clogging and corrosion in water and hydraulic systems

Corrosion and iron clogging are commonly known problems in hydraulic systems. These phenomena are potentially causing great damage to the system or have negative impact on system performance. Scientists at the Leuphana University of Lüneburg developed a novel method to predict iron clogging in water and hydraulic systems.

PLASMA-ROLLER for conditioning of surfaces

The PLASMA-ROLLER allowes to desinfect surfaces and/or activate surfaces for coating. A great variety of materials can be residue-free treated without using chemicals.

Forgery-proof object identification

Unique nano-seals allow for forgery-proof object identification. Due to a combination of ion irradiation and simultaneous co-deposition of metal atoms a unique surface pattern is created. Its manufacturing process and its size of only a few square micrometers make it impossible to be reproduced, thus creating a forgery-proof identifier.

Hybrid Plasma-Laser Micro-Structuring

Unique nano-seals allow for forgery-proof object identification. Due to a combination of ion irradiation and simultaneous co-deposition of metal atoms a unique surface pattern is created. Its manufacturing process and size of a few square micrometers make it impossible to be reproduced, thus creating a forgery-proof identifier.

Resonant material processing using (ultra-)short laser pulses

The invention relates to the usage of a tunable, resonant electromagnetic field for both, the targeted fabrication of structures with dimensions smaller than the used beam diameter and the targeted fabrication of ultra small particles. Therefor the electromagnetic field that is created by an ultra short laser pulse on the surface of an object is superposed with an external field to achieve a resonance rise specific to the processed material.

Efficient manufacturing of undercut or vaulted nano-scaled surfaces

Presented here is a very simple process of manufacturing undercut respectively vaulted surfaces with nano-scaled structures. Especially for cell culture and implantologic purposes those structures are of great interest. Compared to conventional techniques rapid processing of large surface areas is possible.

Ultra-stable cryostage for cryo fluorescence microscopy applications

The invention relates to a sample holder to be used in cryo fluorescence microscopes or to simply and cost effectively upgrade a room temperature fluorescence microscope. The holder solves existing problems regarding thermal and mechanical stability of the sample and allows for a localization accuracy of a few hundred Angstroms.

Energy-efficient and decentralized biological wastewater treatment

Nowadays, biological wastewater treatment can efficiently remove carbon sources. The challenge however lies in the purification and elimination of nitrogen sources within a compact plant design. HAWK-Scientists developed an on-side and energy-efficient biological purification system for a decentralized wastewater treatment.

Direct coupling of light into a planar thin film waveguide

As disposable products, waveguide-based biochips offer a wide of possibilities, but relatively high manufacturing costs often make their use uneconomical. The most important cost factor is the structuring of the chip, which enables effective coupling of the laser light. A novel coupler makes it possible to couple light into chips without structuring.

Flexible plasma electrode design for effective treatment of irregular surfaces

Surface activation or cleaning by cold plasma treatment is getting more and more attention. Current plasma based solutions have mostly fixed electrodes, which are only suited for planar surfaces. Scientists at the HAWK developed a plasma device with flexible electrodes, which allow treatment of irregular surfaces.

Plasma device for tapes and other flexible materials

Surface activation or cleaning by cold plasma is getting more and more attention. Current plasma-based solutions for flexible materials however lack efficiency or are technically too complex and error-prone. Scientists at the HAWK developed a plasma roller device for effective and fast plasma treatment of flexible materials.

Laser transmission welding using carbon fiber reinforced polymers

The invention deals with laser transmission welding of glass fiber reinforced polymers or unreinforced polymers with CFRTP. The absorption of the laser beam occurs mainly on the carbon fibers, thus, adding additives for absorption is not necessary.

Plasma cushion for treating objects

Device and method of treating objects & bulk materials with a physical plasma cushion at atmospheric pressure. The plasma passes from the discharge chamber to the treatment chamber through a sparger plate comprising a multitude of holes, producing a plasma cushion, which supports & slides/pushes the objects while treating them.

Root sided monitoring system for laser welding

The newly developed method improves the monitoring and control process for beam welding. In contrast to most commonly used methods, the new monitoring process is root sided, i. e. it takes place on the back part of the workpiece. Furthermore, the invention describes a monitoring device optimized for beam welding. Beam welding using the invention avoids incomplete fusion at the weld interface and increases the stability of the weld joint.

Gratings on glass surfaces

The newly developed method aims at producing small gratings on different materials, especially on glass surfaces, by ablating small amounts of material. The gratings can be small enough to form patterns with a diffractive effect causing the material to schiller in different colors.

Optical Image Scanning Microscope

The invented method allows to perform high-resolution Image Scanning Microscopy (ISM) purely optically. Very few additional optical components are necessary and the method is suitable for upgrading existing microscopes. The method can also be applied to Two Photon Microscopy.

X-Ray tomography with anisotropic sources

Method for X-ray tomography with low-priced, anisotropic laboratory sources with good resolution and high measurement speed.

One-piece, force-locking compensating coupling made from plastic

The compensating coupling presented here can be inexpensively produced by injection moulding. In contrast to conventional plastic couplings of comparable size and weight, higher torques can be transferred.

Lightweight construction of a loading floor with a vaulted lower side

Here, a new type of loading floor is presented. The vaulted lower side of the loading floor counteracts the force applied to the loading floor when adding heavy cargo. The plane upper surface allows at the same time also the loading of lighter cargo. This enables the manufacturing of a loading floor with lower weight while maintaining the same load capacity.

Plasma hand dryer

Here we present a hand dryer applying simultaneously an atmospheric-pressure plasma which reduces the amount of germs on the hand surface and in the ambient air significantly.

Polarization Lightsheet Microscopy

This invention is an extension for lightsheet microscopy that uses the polarization properties of the analyzed specimen to acquire additional information or to enhance image quality.

Switchable crash absorber

Here we present a newly developed crash absorber for cars with two different conditions for different impact situations. The first condition offers maximal protection for pedestrians, the second condition improves the protection of the car if no pedestrians are involved.

Plasma enhanced LTPS annealing

Procedure to boost efficiency of laser-based amorphous silicon annealing processes by interaction of a homologously shaped laser beam with a standard pressure plasma layer.

Brake dust collector with venturi suction generator for active boundary layer manipulation

For efficient collection of brake or tire dust, this present brake dust collector uses an air feed to shed the dust containing boundary layer off the surface. The suction needed, is provided by a venturi nozzle at the inner surface of the vehicle’s wheel.

Brake dust filter hood with final separator and vortex generator for passive manipulation of the boundary layer

For passive collection of brake dust, the present brake dust collector uses a final separator to shed the dust containing boundary layer off the surface and guide it into filter mats. This shedding becomes even more efficient by integration of a vortex generator inside the hood.

Utility vehicle lightweight chassis with build-in wheel alignment mechanism

Presented here is a rigid, non-driven lightweight chassis for utility vehicles that offers a significant weight advantage and includes a build-in mechanism for cost-effective wheel alignment.

Filter-unit-with-microwave-resonator

Presented here is a filter unit that has one or multiple microwave resonators integrated into its filter material, whereby filter load can be monitored during operation. Thus, filter exchange intervals can be adjusted to actual filter capacity.

Absorbing nanoparticle-suspension for laser drilling

When using laser drilling, the material directly behind the drilled hole can be easily damaged. To prevent the damage, materials are placed at the backside of the hole which absorb the laser radiation. Here, a liquid containing nanoparticles is presented as an effective means of protection.

LICE ERASER — reliably killing of head-lice and their nits

The LICE-ERASER kills the head-lice and their nits reliably and without any side effects. To use, the LICE-ERASER has to be moved through the hair like a hair-brush. The LICE-ERASER produces a cold plasma generated between the comb tooths, which kills the head-lice and their nits. This procedure is completely free of pain, the user will not feel anything.

Kerr-Band-Switch

Based on the Kerr effect, the Kerr band switch implements an alternative concept to mode coupling for the generation of ultra-short laser pulses (UKP) in a cost-effective thin film system. The switch is flexible, ultra-fast and loss-free, has a high damage threshold and only low heating.

New plasma device for chemical-free cleaning and sanitizing of textiles

Scientists at the HAWK in Göttingen, Germany developed a new plasma device for chemical-free cleaning and sanitizing of textiles or clothes. In addition, odors can also be greatly reduced or eliminated. The device consists of two rollers coated with a flexible dielectric material, which serve as electrodes for plasma treatment.

Slaughter-integrated laser marking of farm-animals

Scientists at the Laser Zentrum Hannover, Germany developed a laser-based method for processing and marking of animals during slaughter. This greatly improves traceability, which on the one hand is demanded by many modern consumers and on the other hand makes it easier to sort out unfit carcasses.

Laser Captive Bolt Gun

For reliably stunning animals for slaughter a hybrid captive bolt gun is presented, that has an internal radiation channel through which, after penetration of the animals skull, a high energy laser beam is emitted to induce a coagulation of brain tissue in the Medulla oblongata region, the connection between brain an spinal cord.