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Showing 1 to 12 of 49 entries
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Modulation of field emission properties of znO nanorods during arc discharge.

Journal of nanoscience and nanotechnology

Fang F, Kennedy J, Carder DA, Futter J, Murmu P, Markwitz A.
PMID: 21121322
J Nanosci Nanotechnol. 2010 Dec;10(12):8239-43. doi: 10.1166/jnn.2010.3009.

Zinc oxide (ZnO) nanorods have been synthesized via the arc discharge method. Different oxygen partial pressures were applied in the arc discharge chamber to modulate the field emission properties of the as-synthesized ZnO nanorods. Scanning electron microscopy (SEM) was...

Ordered array of self-assembled SiC nanocrystals fabricated by selective oxide desorption and nanosphere lithography.

Nanotechnology

Hopf T, Leveneur J, Markwitz A.
PMID: 21071823
Nanotechnology. 2010 Dec 10;21(49):495302. doi: 10.1088/0957-4484/21/49/495302. Epub 2010 Nov 11.

We have developed a novel technique based on the selective desorption of an oxide film in order to grow ordered arrays of silicon carbide nanocrystals on a silicon surface. These nanocrystals form as a byproduct of void nucleation in...

Electron beam annealing of Fe+ implanted Si nanostructures.

Journal of nanoscience and nanotechnology

Markwitz A, Fang F, Kaiser J, Carder DA, Kennedy J, Zülicke U, Johnson PB.
PMID: 21137761
J Nanosci Nanotechnol. 2010 Oct;10(10):6556-61. doi: 10.1166/jnn.2010.2650.

Silicon nanostructures (nanowhiskers) have been formed at surface densities approximately 10(9) cm-2 by electron beam annealing (EBA) prior to the implantation of 7 keV Fe+ ions to fluences from 1 x 10(13) - 4 x 10(15) Fe+ cm(-2). A...

Onset temperature for Si nanostructure growth on Si substrate during high vacuum electron beam annealing.

Journal of nanoscience and nanotechnology

Fang F, Markwitz A.
PMID: 19452954
J Nanosci Nanotechnol. 2009 May;9(5):2950-5. doi: 10.1166/jnn.2009.210.

Silicon nanostructures, called Si nanowhiskers, are successfully synthesized on Si(100) substrate by high vacuum electron beam annealing. The onset temperature and duration needed for the Si nanowhiskers to grow was investigated. It was found that the onset and growth...

Superparamagnetic Iron Oxide Nanoparticles-Current and Prospective Medical Applications.

Materials (Basel, Switzerland)

Dulińska-Litewka J, Łazarczyk A, Hałubiec P, Szafrański O, Karnas K, Karewicz A.
PMID: 30791358
Materials (Basel). 2019 Feb 19;12(4). doi: 10.3390/ma12040617.

The recent, fast development of nanotechnology is reflected in the medical sciences. Superparamagnetic Iron Oxide Nanoparticles (SPIONs) are an excellent example. Thanks to their superparamagnetic properties, SPIONs have found application in Magnetic Resonance Imaging (MRI) and magnetic hyperthermia. Unlike...

Nanohydrogels Based on Self-Assembly of Cationic Pullulan and Anionic Dextran Derivatives for Efficient Delivery of Piroxicam.

Pharmaceutics

Lachowicz D, Mielczarek P, Wirecka R, Berent K, Karewicz A, Szuwarzyński M, Zapotoczny S.
PMID: 31766517
Pharmaceutics. 2019 Nov 21;11(12). doi: 10.3390/pharmaceutics11120622.

A cationic derivative of pullulan was obtained by grafting reaction and used together with dextran sulfate to form polysaccharide-based nanohydrogel cross-linked via electrostatic interactions between polyions. Due to the polycation-polyanion interactions nanohydrogel particles were formed instantly and spontaneously in...

Hydrogen bonding rearrangement by a mitochondrial disease mutation in cytochrome .

Proceedings of the National Academy of Sciences of the United States of America

Kuleta P, Lasham J, Sarewicz M, Ekiert I, Sharma V, Ekiert R, Osyczka A.
PMID: 34389670
Proc Natl Acad Sci U S A. 2021 Aug 17;118(33). doi: 10.1073/pnas.2026169118.

Hemes are common elements of biological redox cofactor chains involved in rapid electron transfer. While the redox properties of hemes and the stability of the spin state are recognized as key determinants of their function, understanding the molecular basis...

[Annual report 2019 of the German pacemaker and defibrillator registry-part 1: cardiac pacemakers : Working group on cardiac pacemakers and cardioverter-defibrillators at IQTIG-Institute for Quality Assurance and Transparency in Healthcare].

Herzschrittmachertherapie & Elektrophysiologie

Markewitz A.
PMID: 34338856
Herzschrittmacherther Elektrophysiol. 2021 Dec;32(4):510-523. doi: 10.1007/s00399-021-00796-x. Epub 2021 Aug 02.

No abstract available.

Comparison of a unipolar defibrillation system with a dual lead system using an enlarged defibrillation anode.

Pacing and clinical electrophysiology : PACE

Mattke S, Fiek M, Markewitz A, Müller D, Hoffmann E, Schmöckel M, Steinbeck G.
PMID: 8994947
Pacing Clin Electrophysiol. 1996 Dec;19(12):2083-8. doi: 10.1111/j.1540-8159.1996.tb03282.x.

The unipolar system for transvenous defibrillation, consisting of a single right ventricular lead as the cathode and the device shell as anode, has been shown to combine low defibrillation thresholds (DFTs) and simple implantation techniques. We compared the defibrillation...

[German S3 Guideline - Oxygen Therapy in the Acute Care of Adult Patients].

Pneumologie (Stuttgart, Germany)

Gottlieb J, Capetian P, Hamsen U, Janssens U, Karagiannidis C, Kluge S, König M, Markewitz A, Nothacker M, Roiter S, Unverzagt S, Veit W, Volk T, Witt C, Wildenauer R, Worth H, Fühner T.
PMID: 34474487
Pneumologie. 2021 Sep 02; doi: 10.1055/a-1554-2625. Epub 2021 Sep 02.

BACKGROUND:  Oxygen (OMETHODS:  A S3-guideline was developed and published within the Program for National Disease Management Guidelines (AWMF) with participation of 10 medical associations. Literature search was performed until Feb 1st 2021 to answer 10 key questions. The Oxford...

Magnetization Dynamics and Coherent Spin Manipulation of a Propeller Gd(III) Complex with the Smallest Helicene Ligand.

The journal of physical chemistry letters

Handzlik G, Magott M, Arczyński M, Sheveleva AM, Tuna F, Sarewicz M, Osyczka A, Rams M, Vieru V, Chibotaru LF, Pinkowicz D.
PMID: 31994400
J Phys Chem Lett. 2020 Feb 20;11(4):1508-1515. doi: 10.1021/acs.jpclett.9b03275. Epub 2020 Feb 07.

A homoleptic gadolinium(III) complex with the smallest helicene-type ligand, 1,10-phenanthroline-

Photophysics and photochemistry of NIR absorbers derived from cyanines: key to new technologies based on chemistry 4.0.

Beilstein journal of organic chemistry

Strehmel B, Schmitz C, Kütahya C, Pang Y, Drewitz A, Mustroph H.
PMID: 32273905
Beilstein J Org Chem. 2020 Mar 18;16:415-444. doi: 10.3762/bjoc.16.40. eCollection 2020.

Cyanines derived from heptamethines were mainly discussed regarding their functionalization to broaden the solubility in different surroundings exhibiting either hydrophilic or hydrophobic properties and to tailor made the Δ

Showing 1 to 12 of 49 entries