Browsing School of Physics by Author "HEGNER, MARTIN"
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Analyzing refractive index changes and differential bending in microcantilever arrays
HEGNER, MARTIN (2008)A new microcantilever array design is investigated comprising eight flexible microcantilevers introducing two solid bars, enabling to subtract contributions from differences in refractive index in an optical laser read out ... -
Capacitive micromachined ultrasonic transducers for chemical detection in nitrogen
HEGNER, MARTIN (2007)The authors present the prototype of a chemical sensor using a capacitive micromachined ultrasonic transducer array. Each element in the array consists of a large number of resonating membranes connected in parallel. A ... -
Chladni Figures Revisited based on Nanomechanics
HEGNER, MARTIN (2007)Chladni patterns based on nanomechanics in the microfluidic environment are presented. In contrast with the macroscopic observations in the gaseous environment, nanoparticles are found to move to the nodes, whereas ... -
Comprehenisive characterization of molecular interactions based on nanomechanics
HEGNER, MARTIN (2008)Molecular interaction is a key concept in our understanding of the biological mechanisms of life. Two physical properties change when one molecular partner binds to another. Firstly, the masses combine and secondly, the ... -
Device for filamentous fungi growth monitoring using the multimodal frequency response of cantilevers.
HEGNER, MARTIN (2014)Filamentous fungi cause opportunistic infections in hospital patients. A fast assay to detect viable spores is of great interest. We present a device that is capable of monitoring fungi growth in real time via the dynamic ... -
Fibre Optic Readout of Microcantilever Arrays for Fast Microorganism Growth Detection
HEGNER, MARTIN (2012)We present a fibre-optic-based device for the automated readout of microcantilever arrays for fast microorganism growth detection. We determined the ability of our device to track shifts in resonance frequency due to an ... -
Ink-Jet Printing: Perfect Tool for Cantilever Array Sensor Preparation for Microbial Growth Detection
HEGNER, MARTIN (2012)The use of microcantilever arrays for microbial growth detection provides a rapid and reliable technique for monitoring growth in industrial and clinical applications. Improving the reproducibility and sensitivity of this ... -
Instrument for Label-Free Detection of Noncoding RNAs Journal of Sensors,
HEGNER, MARTIN (2012)We set up a label-free direct binding assay for the detection of noncoding RNAs. The assay is based on nanomechanical cantilever arrays for the detection of surface stress induced by immobilized biomolecules and their ... -
Interaction of cationic surfactants with DNA: a single-molecule study
HEGNER, MARTIN (2008)The interaction of cationic surfactants with single dsDNA molecules has been studied using forcemeasuring optical tweezers. For hydrophobic chains of length 12 and greater, pulling experiments show characteristic ... -
Micromechanical mass sensors for biomolecular detection in a physiological environment
HEGNER, MARTIN (2005)Micromechanical cantilever arrays are used to measure time-resolved adsorption of tiny masses based on protein-ligand interactions. Here, streptavidin-biotin interactions are investigated in a physiological environment. A ... -
Nanomechanical sensing
HEGNER, MARTIN (2012) -
Predictions of the Compressible Fluid Model and its Comparison to Experimental Measurements of Q Factors and Flexural Resonance Frequencies for Microcantilevers
HEGNER, MARTIN (2012)The qualitative agreement between experimental measurements of the 𝑄 factors and flexural resonance frequencies in air of microcantilevers and calculations based on the compressible fluid model of Van Eysden and Sader ... -
Quantitative, Label-Free Detection of the Aggregation of alpha-Synuclein Using Microcantilever Arrays Operated in a Liquid Environment
HEGNER, MARTIN (2012)Early detection of protein aggregation is of great importance in the field of neurodegenerative diseases. The successful detection of the aggregation of the protein ?-synuclein in a quantitative, label-free manner by ... -
Rapid and Reliable Calibration of Laser Beam Deflection System for Microcantilever-Based Sensor Setups
HEGNER, MARTIN; MISHRA, ROHIT (2012)Cantilever array-based sensor devices widely utilise the laser-based optical deflection method for measuring static cantilever deflections mostly with home-built devices with individual geometries. In contrast to scanning ... -
RealTime Mass Sensing by Nanomechanical Resonatorsin Fluid
HEGNER, MARTIN (2004)We have developed a sensitive method for real-time mass sensing in a fluid using a microfabricated array of nanomechanical cantilevers actuated at their resonance frequencies. The sensor platform consists of a streptavidin ... -
Resonating modes of vibrating microcantilevers in liquid
HEGNER, MARTIN (2008)A study of nanomechanical cantilevers vibrating at various resonating modes in liquid is presented. Resonant frequency spectrum with 16 well resolved flexural modes is obtained. The quality factor increased from 1 at mode ... -
VirE2: A Unique ssDNA Compacting Molecular Machine
HEGNER, MARTIN (2008)The translocation of single-stranded DNA (ssDNA) across membranes of two cells is a fundamental biological process occurring in both bacterial conjugation and Agrobacterium pathogenesis. Whereas bacterial conjugation spreads ...