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Showing 1 to 12 of 205 entries
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Optically controlled thermophoretic trapping of single nano-objects.

ACS nano

Braun M, Cichos F.
PMID: 24215133
ACS Nano. 2013 Dec 23;7(12):11200-8. doi: 10.1021/nn404980k. Epub 2013 Nov 13.

Brownian motion is driven by thermal fluctuations and becoming more efficient for decreasing size and elevated temperatures. Here, we show that despite the increased fluctuations local temperature fields can be used to localize and control single nano-objects in solution....

Ion transfer battery: storing energy by transferring ions across liquid-liquid interfaces.

Chemical communications (Cambridge, England)

Peljo P, Bichon M, Girault HH.
PMID: 27327108
Chem Commun (Camb). 2016 Jul 28;52(63):9761-4. doi: 10.1039/c6cc04325a.

A battery utilizing the Galvani potential difference between aqueous and organic phases is demonstrated. The battery consists of two organic redox electrolytes separated by an immiscible aqueous phase. The charge is stored by transferring a salt from the aqueous...

Comment on "Optimal detection angle in sub-diffraction resolution photothermal microscopy: application for high sensitivity imaging of biological tissues".

Optics express

Selmke M, Cichos F.
PMID: 25836891
Opt Express. 2015 Mar 09;23(5):6747-50. doi: 10.1364/OE.23.006747.

A recent publication [Opt. Express, 22(16), 18833-18842 (2014)] discusses the optimal detection aperture in photothermal single particle microscopy. This new theory is in contradiction with rigorous ab-initio electrodynamic calculations. Nonetheless, the experimentally verified conclusion that a maximum signal occurs...

Interaction of lanthanide β-diketonate complexes with polyvinylpyrrolidone: proton-controlled switching of Tb3+ luminescence.

The journal of physical chemistry. B

Karbowiak M, Cichos J, Buczko K.
PMID: 24328294
J Phys Chem B. 2014 Jan 09;118(1):226-39. doi: 10.1021/jp408328h. Epub 2013 Dec 20.

In the present study the interaction of lanthanide β-diketonate complexes with polyvinylpyrrolidone (PVP) has been systematically investigated using fluorescence spectroscopy. The emission of terbium complexes with hexafluoroacetylacetone (hfa) ligands is almost completely quenched by PVP in the absence of...

Trapping of single nano-objects in dynamic temperature fields.

Physical chemistry chemical physics : PCCP

Braun M, Würger A, Cichos F.
PMID: 24939651
Phys Chem Chem Phys. 2014 Aug 07;16(29):15207-13. doi: 10.1039/c4cp01560f. Epub 2014 Jun 17.

In this article we explore the dynamics of a Brownian particle in a feedback-free dynamic thermophoretic trap. The trap contains a focused laser beam heating a circular gold structure locally and creating a repulsive thermal potential for a Brownian...

Metal nanoparticle based all-optical photothermal light modulator.

ACS nano

Heber A, Selmke M, Cichos F.
PMID: 24437364
ACS Nano. 2014 Feb 25;8(2):1893-8. doi: 10.1021/nn406389f. Epub 2014 Jan 23.

We present a simple scheme for the manipulation of light intensity by light mediated by a dissipative process. The implementation employs the heat released by an optically excited plasmonic metal nanoparticle to control the size of an isotropic bubble...

Thermo-Osmotic Flow in Thin Films.

Physical review letters

Bregulla AP, Würger A, Günther K, Mertig M, Cichos F.
PMID: 27203347
Phys Rev Lett. 2016 May 06;116(18):188303. doi: 10.1103/PhysRevLett.116.188303. Epub 2016 May 05.

We report on the first microscale observation of the velocity field imposed by a nonuniform heat content along the solid-liquid boundary. We determine both radial and vertical velocity components of this thermo-osmotic flow field by tracking single tracer nanoparticles....

Thermal diffusivity measured using a single plasmonic nanoparticle.

Physical chemistry chemical physics : PCCP

Heber A, Selmke M, Cichos F.
PMID: 26214156
Phys Chem Chem Phys. 2015 Aug 28;17(32):20868-72. doi: 10.1039/c5cp02920a. Epub 2015 Jul 27.

A method to measure thermal diffusivity around a single heated gold nanoparticle is presented. It is based on photothermal single particle microscopy and employs the phase delay of temperature modulation due to finite thermal diffusivity. The phase delay is...

Identification of increased genetic risk scores for schizophrenia in treatment-resistant patients.

Molecular psychiatry

Frank J, Lang M, Witt SH, Strohmaier J, Rujescu D, Cichon S, Degenhardt F, Nöthen MM, Collier DA, Ripke S, Naber D, Rietschel M.
PMID: 25869806
Mol Psychiatry. 2015 Jul;20(7):913. doi: 10.1038/mp.2015.52. Epub 2015 Apr 14.

No abstract available.

Adult age differences in prospective memory in the laboratory: are they related to higher stress levels in the elderly?.

Frontiers in human neuroscience

Ihle A, Kliegel M, Hering A, Ballhausen N, Lagner P, Benusch J, Cichon A, Zergiebel A, Oris M, Schnitzspahn KM.
PMID: 25566036
Front Hum Neurosci. 2014 Dec 23;8:1021. doi: 10.3389/fnhum.2014.01021. eCollection 2014.

To explain age deficits found in laboratory-based prospective memory (PM) tasks, it has recently been suggested that the testing situation per se may be more stressful for older adults, thereby impairing their performance. To test this assumption, subjective and...

Non-tunneled central venous catheters in adult stem cell transplantation recipients: An effective option.

The journal of vascular access

Cicconi S, Pittiruti M, Buononato M, Piccirillo N, Sorà F, Chiusolo P, Laurenti L, Leone G, Sica S.
PMID: 17638282
J Vasc Access. 2001 Oct-Dec;2(4):168-74. doi: 10.1177/112972980100200407.

Stem cell transplantation (SCT) recipients require central venous catheter (CVC) insertion for the administration of chemotherapy, antibiotics and total parenteral nutrition. Traditionally, tunneled CVC have been considered as the golden standard although they require surgery for both insertion and...

Feasible and successful: genome-wide interaction analysis involving all 1.9 x 10(11) pair-wise interaction tests.

Human heredity

Steffens M, Becker T, Sander T, Fimmers R, Herold C, Holler DA, Leu C, Herms S, Cichon S, Bohn B, Gerstner T, Griebel M, Nöthen MM, Wienker TF, Baur MP.
PMID: 20357478
Hum Hered. 2010;69(4):268-84. doi: 10.1159/000295896. Epub 2010 Mar 31.

The Genome-Wide Association Study (GWAS) is the study design of choice for detecting common genetic risk factors for multifactorial diseases. The performance of full Genome-Wide Interaction Analyses (GWIA) has always been considered computationally challenging. Two-stage strategies to reduce the...

Showing 1 to 12 of 205 entries