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Showing 1 to 12 of 15 entries
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Label-free water sensors using hybrid polymer-dielectric mid-infrared optical waveguides.

ACS applied materials & interfaces

Lin PT, Giammarco J, Borodinov N, Savchak M, Singh V, Kimerling LC, Tan DT, Richardson KA, Luzinov I, Agarwal A.
PMID: 25924561
ACS Appl Mater Interfaces. 2015 Jun 03;7(21):11189-94. doi: 10.1021/acsami.5b01013. Epub 2015 May 20.

A chip-scale mid-IR water sensor was developed using silicon nitride (SiN) waveguides coated with poly(glycidyl methacrylate) (PGMA). The label-free detection was conducted at λ=2.6-2.7 μm because this spectral region overlaps with the characteristic O-H stretch absorption while being transparent...

Asymmetrically Functionalized 1,3-Di(2-pyridyl)benzenes: Synthesis and Photophysical Studies.

Journal of fluorescence

Starnovskaya ES, Kopchuk DS, Shtaitz YK, Savchuk MI, Nikonov IL, Egorov IN, Zyryanov GV, Rusinov VL, Chupakhin ON.
PMID: 34618285
J Fluoresc. 2022 Jan;32(1):125-133. doi: 10.1007/s10895-021-02759-4. Epub 2021 Oct 07.

A convenient synthetic approach to asymmetrically functionalized 1,3-di(2-pyridyl)benzenes starting from 3-(3-bromophenyl)-1,2,4-triazines using sequential aza-Diels-Alder reactions and Stille cross-coupling is reported. Photophysical properties of the obtained compounds are studied.

Absorption cross section of gold nanoparticles based on NIR laser heating and thermodynamic calculations.

Scientific reports

Alrahili M, Savchuk V, McNear K, Pinchuk A.
PMID: 33139828
Sci Rep. 2020 Nov 02;10(1):18790. doi: 10.1038/s41598-020-75895-9.

We present a method for measuring the optical absorption cross section ([Formula: see text]) of gold nanoparticles (GNPs) based on optically heating the solution of GNPs with an 808 nm near-infrared (NIR) laser and measuring the temperature increase of...

Asymmetrically Functionalized 1,3-Di(2-pyridyl)benzenes: Synthesis and Photophysical Studies.

Journal of fluorescence

Starnovskaya ES, Kopchuk DS, Shtaitz YK, Savchuk MI, Nikonov IL, Egorov IN, Zyryanov GV, Rusinov VL, Chupakhin ON.
PMID: 34618285
J Fluoresc. 2021 Oct 07; doi: 10.1007/s10895-021-02759-4. Epub 2021 Oct 07.

A convenient synthetic approach to asymmetrically functionalized 1,3-di(2-pyridyl)benzenes starting from 3-(3-bromophenyl)-1,2,4-triazines using sequential aza-Diels-Alder reactions and Stille cross-coupling is reported. Photophysical properties of the obtained compounds are studied.

Controlling deformations of gel-based composites by electromagnetic signals within the GHz frequency range.

Soft matter

Savchak O, Morrison T, Kornev KG, Kuksenok O.
PMID: 30335123
Soft Matter. 2018 Nov 07;14(43):8698-8708. doi: 10.1039/c8sm01207e.

Using theoretical and computational modeling, we focus on dynamics of gels filled with uniformly dispersed ferromagnetic nanoparticles subjected to electromagnetic (EM) irradiation within the GHz frequency range. As a polymer matrix, we choose poly(N-isopropylacrylamide) gel, which has a low...

Highly Conductive and Transparent Reduced Graphene Oxide Nanoscale Films via Thermal Conversion of Polymer-Encapsulated Graphene Oxide Sheets.

ACS applied materials & interfaces

Savchak M, Borodinov N, Burtovyy R, Anayee M, Hu K, Ma R, Grant A, Li H, Cutshall DB, Wen Y, Koley G, Harrell WR, Chumanov G, Tsukruk V, Luzinov I.
PMID: 29286620
ACS Appl Mater Interfaces. 2018 Jan 31;10(4):3975-3985. doi: 10.1021/acsami.7b16500. Epub 2018 Jan 18.

Despite noteworthy progress in the fabrication of large-area graphene sheetlike nanomaterials, the vapor-based processing still requires sophisticated equipment and a multistage handling of the material. An alternative approach to manufacturing functional graphene-based films includes the employment of graphene oxide...

Coumarin-pyridine push-pull fluorophores: Synthesis and photophysical studies.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

Fatykhov RF, Sharapov AD, Starnovskaya ES, Shtaitz YK, Savchuk MI, Kopchuk DS, Nikonov IL, Zyryanov GV, Khalymbadzha IA, Chupakhin ON.
PMID: 34749256
Spectrochim Acta A Mol Biomol Spectrosc. 2021 Oct 19;267:120499. doi: 10.1016/j.saa.2021.120499. Epub 2021 Oct 19.

A series of coumarin-pyridine-based push-pull fluorophores were prepared starting from 1,2,4-triazines by using direct C-H functionalization (S

5-Aryl-6-arylthio-2,2'-bipyridine and 6-Arylthio-2,5-diarylpyridine Fluorophores: Pot, Atom, Step Economic (PASE) Synthesis and Photophysical Studies.

Journal of fluorescence

Savchuk MI, Kopchuk DS, Taniya OS, Nikonov IL, Egorov IN, Santra S, Zyryanov GV, Chupakhin ON, Charushin VN.
PMID: 33966136
J Fluoresc. 2021 Jul;31(4):1099-1111. doi: 10.1007/s10895-021-02714-3. Epub 2021 May 08.

A PASE (pot, step, atom, economic) synthetic approach to 5-aryl-6-arylthio-2,2'-bipyridine and 6-arylthio-2,5-diarylpyridine ligands/fluorophores has been reported via S

Going the Extra (Synaptic) Mile: Excitotoxicity as the Road Toward Neurodegenerative Diseases.

Frontiers in cellular neuroscience

Armada-Moreira A, Gomes JI, Pina CC, Savchak OK, Gonçalves-Ribeiro J, Rei N, Pinto S, Morais TP, Martins RS, Ribeiro FF, Sebastião AM, Crunelli V, Vaz SH.
PMID: 32390802
Front Cell Neurosci. 2020 Apr 24;14:90. doi: 10.3389/fncel.2020.00090. eCollection 2020.

Excitotoxicity is a phenomenon that describes the toxic actions of excitatory neurotransmitters, primarily glutamate, where the exacerbated or prolonged activation of glutamate receptors starts a cascade of neurotoxicity that ultimately leads to the loss of neuronal function and cell...

Androgenic potential of human fetal adrenals at the end of the first trimester.

Endocrine connections

Savchuk I, Morvan ML, Antignac JP, Gemzell-Danielsson K, Le Bizec B, Söder O, Svechnikov K.
PMID: 28592511
Endocr Connect. 2017 Aug;6(6):348-359. doi: 10.1530/EC-17-0085. Epub 2017 Jun 07.

The onset of steroidogenesis in human fetal adrenal glands (HFA) during the first trimester is poorly investigated. An unresolved question is the capacity of the HFA to produce potent androgen DHT via conventional and/or the backdoor pathway(s) at the...

Magneto-optical Faraday rotation of semiconductor nanoparticles embedded in dielectric matrices.

Applied optics

Savchuk AI, Stolyarchuk ID, Makoviy VV, Savchuk OA.
PMID: 24787207
Appl Opt. 2014 Apr 01;53(10):B22-6. doi: 10.1364/AO.53.000B22.

Faraday rotation has been studied for CdS, CdTe, and CdS:Mn semiconductor nanoparticles synthesized by colloidal chemistry methods. Additionally these materials were prepared in a form of semiconductor nanoparticles embedded in polyvinyl alcohol films. Transmission electron microscopy and atomic force...

Particle-substrate interactions in the laser deposition process.

Nanotechnology

Savchuk VV, Jenkins NW, Pinchuk AO.
PMID: 32101799
Nanotechnology. 2020 Mar 27;31(24):245304. doi: 10.1088/1361-6528/ab7a2e. Epub 2020 Feb 26.

We theoretically study particle-substrate interactions under laser irradiation. Van der Waals, electrostatic double layer and a laser induced dipole in the nanoparticle and an image dipole in the substrate were considered to be the major components of the total...

Showing 1 to 12 of 15 entries