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ESEM in Plant Sciences - Versatile Tool to Study Native & Hydrated Plant Surfaces
Apr. 11, 2011

ESEM in Plant Sciences - Versatile Tool to Study Native & Hydrated Plant Surfaces

ESEM (Environmental Scanning Electron Microscopy) enables the investigation of native, hydrated and uncoated plant surfaces without further sample preparation and the in situ observation of dynamic processes at SEM resolution. A selection of representative plant samples and applications will be presented to show that ESEM is a versatile tool in plant science. more
Live-Cell Super-Resolution with dSTORM
Apr. 04, 2011

Live-Cell Super-Resolution with dSTORM

Live-Cell Super-Resolution with dSTORM: A detailed microscopic characterization of cellular structures is important to understand cellular function. Conventional microscopy in some cases is limited by the achievable spatial resolution of about 200 nm in the imaging plane, which is not sufficient to reveal details at the near-molecular level. This is important if the organization of proteins in small organelles, clusters or machineries are studied. more
Looking Inside Molecules
Jan. 21, 2011

Looking Inside Molecules

Molecular hydrogen (H2) or deuterium (D2) condensed in a low-temperature STM results in a new type of imaging resolution - scanning tunneling hydrogen microscopy (STHM). The microscope operated in the STHM regime images the inner structure of large organic flat lying molecules as well as intermolecular interactions in organic monolayer films.
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Domains In Thin Organic Films Studied by Polarized SNOM Investigations
Jan. 13, 2011

Domains In Thin Organic Films Studied by Polarized SNOM Investigations

We present a SNOM-study of highly-crystalline organic films of an oligomeric polyquater-thiophene (PQT-12). The crystalline structure influences the suitability of films for applications as charge transport in devices as e.g. OFETs. more
Geometric Effects in the Field Emission of Surfaces with Factional Dimension
Jan. 11, 2011

Geometric Effects in the Field Emission of Surfaces with Factional Dimension

The study of effective cold sources of high intensity electron beam couplings is one of actual problems of modern vacuum micro and nanoelectronics. As far as it is known, the difficulties for determining significant absolute values for the field emission current are connected to extremely small values of the effective emission area, which is very small compared with the macroscopic area of a cathode substrate [1]. With the scale properties related to real surfaces, it is possible to simulate the enhancement of the effective area at low anode voltages. more
Demonstration of Carbon Nano-Onions Functionalization with Biomolecules by AFM and FT-IR Studies
Jan. 10, 2011

Demonstration of Carbon Nano-Onions Functionalization with Biomolecules by AFM and FT-IR Studies

Small (5-6 nm) oxidized Carbon Nano-Onions (ox-CNOs) can be functionalized with biomolecules due to their good dispersion and relative high reactivity. MTS test on skin fibroblasts proved that CNOs are non-cytotoxic [1]. Therefore, biosensors based on CNOs were fabricated. Covalent binding between sensor layers were possible after functionalization CNOs with carboxylic groups (ox-CNOs) by chemical oxidation using method applied by Lieber et al. [2]. Oxidized CNOs become soluble in an aqueous solution. more
Quantitative Microscopy without Lenses
Dec. 27, 2010

Quantitative Microscopy without Lenses

Minimisation of the geometric restrictions and image infidelities imposed by imperfect physical focussing devices has been the subject of microscopy research for many decades, as has the development of ways to recover information-rich phase data lost by detectors that are sensitive only to illumination intensity. more
Towards Automated AFM-based Nanohandling of DNA, SAMs and CNTs
Dec. 21, 2010

Towards Automated AFM-based Nanohandling of DNA, SAMs and CNTs

Besides its ability of high resolution imaging, the Atomic Force Microscope (AFM) has been recognized as a valuable instrument for manipulation at the nanoscale. The characterization and manipulation of Carbon Nanotubes (CNTs) and DNA or the prototypical surface structuring of sensitive elements for biosensors are main applications for AFM-based nanohandling. The relatively low throughput induced by the sequential character of the AFM is one of the major drawbacks that arise, if the AFM is used as a robot for nanomanipulation. more
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