S.B. Orlinskii

Publications (13)9.77 Total impact

• Source

  Available from: I.V. Borovykh

  Article: Use of spin labels to study membrane proteins by high-frequency electron nuclear double resonance spectroscopy

  S. B. Orlinskii, I. V. Borovykh, V. Zielke, H. -J. Steinhoff
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  ABSTRACT: The applicability of spin labels to study membrane proteins by high-frequency electron nuclear double resonance spectroscopy is demonstrated. With the use of bacteriorhodopsin embedded in a lipid membrane as an example, the spectra of protons of neighboring amino acids are recorded, electric field gradients at the membrane surface are detected, and the constant of hyperfine interaction with the chlorine nucleus at the site of ion trapping is measured.
  JETP Letters 04/2012; 86(2):149-152. · 1.35 Impact Factor
• Source

  Available from: Nikolai G Romanov

  Article: Giant change in the intensity of tunneling afterglow in excited ZnO quantum dots induced by the spin reorientation of electron-hole pairs in static and microwave magnetic fields

  P. G. Baranov, N. G. Romanov, D. O. Tolmachev, C. de Mello Donegá, A. Meijerink, S. B. Orlinskii, J. Schmidt
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  ABSTRACT: Long afterglow has been detected in light-excited ZnO quantum dots caused by the spin-dependent tunneling recombination of electron and hole centers. A giant increase in the intensity of afterglow upon a change in the spin orientation of electron and hole centers has been observed under electron paramagnetic resonance conditions, which allowed these centers to be identified.
  JETP Letters 01/2006; 84(7):400-403. · 1.35 Impact Factor
• Source

  Available from: uu.nl

  Article: High-frequency EPR and ENDOR spectroscopy on semiconductor nanocrystals.

  S B Orlinskii, H Blok, E J J Groenen, J Schmidt, P G Baranov, C de Mello Donegá, A Meijerink
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  ABSTRACT: EPR and ENDOR experiments at 95 GHz on ZnO nanoparticles reveal the presence of shallow donors related to interstitial Li and Na atoms. The experiments allowed, for the first time, to probe the effect of confinement on the shape of the electronic wave function. In addition, it is observed that the 67Zn nuclear spins become polarized upon saturation of the EPR transition. This Overhauser effect is induced by the zero-point vibrations of the phonon system in the nanoparticles.
  Magnetic Resonance in Chemistry 12/2005; 43 Spec no.:S140-4. · 1.44 Impact Factor
• Article: EPR identification of the triplet ground state and photoinduced population inversion for a Si-C divacancy in silicon carbide

  P. G. Baranov, I. V. Il’in, E. N. Mokhov, M. V. Muzafarova, S. B. Orlinskii, J. Schmidt
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  ABSTRACT: It is shown that intrinsic defects responsible for the semi-insulating properties of SiC represent Si-C divacancies in a neutral state (V Si-V C)0, which have the triplet ground state. The energy level scheme and the mechanism of creating the photoinduced population inversion of the triplet sublevels of the divacancy ground state are determined. It is concluded that there is a singlet excited state through which spin polarization is accomplished, and this fact opens the possibility of detecting magnetic resonance on single divacancies.
  JETP Letters 09/2005; 82(7):441-443. · 1.35 Impact Factor
• Article: ENDOR spectroscopy at 275 GHz.

  H Blok, J A J M Disselhorst, H van der Meer, S B Orlinskii, J Schmidt
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  ABSTRACT: A pulsed ENDOR spectrometer operating at a microwave frequency of 275 GHz is described. The results demonstrate that this type of spectroscopy can now be performed routinely at this high microwave frequency. The advantages compared to conventional EPR frequencies are the high spectral resolution, time resolution, and sensitivity.
  Journal of Magnetic Resonance 04/2005; 173(1):49-53. · 2.14 Impact Factor
• Article: A continuous-wave and pulsed electron spin resonance spectrometer operating at 275 GHz.

  H Blok, J A J M Disselhorst, S B Orlinskii, J Schmidt
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  ABSTRACT: An electron paramagnetic resonance (EPR) spectrometer is described which allows for continuous-wave and pulsed EPR experiments at 275 GHz (wavelength 1.1 mm). The related magnetic field of 9.9 T for g approximately 2 is supplied by a superconducting solenoid. The microwave bridge employs quasi-optical as well as conventional waveguide components. A cylindrical, single-mode cavity provides a high filling factor and a high sensitivity for EPR detection. Even with the available microwave power of 1 mW incident at the cavity a high microwave magnetic field B1 is obtained of about 0.1 mT which permits pi/2-pulses as short as 100 ns. The performance of the spectrometer is illustrated with the help of spectra taken with several samples.
  Journal of Magnetic Resonance 02/2004; 166(1):92-9. · 2.14 Impact Factor
• Article: Dynamical nuclear polarization by means of shallow donors in ZnO quantum dots

  P.G. Baranov, S.B. Orlinskii, C. de Mello Donega, A. Meijerink, H Blok, J Schmidt
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  ABSTRACT: The almost complete dynamic nuclear polarization (DNP) of nuclear spins has been demonstrated can be achieved in ZnO and AgCl single crystals by saturating the EPR transition of the shallow donor (SD) present in this crystals with using high-frequency (275 and 95 GHz) at low temperatures. DNP effects have also been observed in ZnO quantum dots (QD's) where polarization of 67Zn nuclear spins in ZnO core and of 1H nuclear spins in the Zn(OH)2 capping layer have been obtained by saturating the EPR transition of the SD present in the ZnO QD's. DNP manifests itself via a shift of the EPR lines of SD in bulk ZnO and AgCl crystals and the creation of a hole and an antihole in the EPR absorption line of the SD in QD's. The enhancement of the nuclear polarization opens the possibility to study semiconductor nanostructures with NMR techniques.
• Source

  Available from: uu.nl

  Article: Dynamic nuclear polarization of 67Zn and ¹H spins by means of shallow donors in ZnO nanoparticles

  S.B. Orlinskii, J Schmidt, P.G. Baranov, Celso de Mello Donegá, A. Meijerink
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  ABSTRACT: Dynamic nuclear polarization DNP effects are observed of 67Zn (I=5/2) nuclear spins in ZnO nanoparticles and of ¹H (I=1/2) spins of the Zn(OH)₂ capping layer. The almost complete polarization of these nuclear spins is achieved by saturating the electron paramagnetic resonance transition of the shallow interstitial Li donor present in the ZnO nanoparticles. The remarkable aspect is that this DNP is caused by an Overhauser mechanism although the phonons mediating the polarization process do not fit into the nanoparticles. An explanation of this DNP process is presented, and it is shown that this allows for a measurement of the distribution of phonon modes in the nanoparticles. The enhancement of the nuclear polarization also opens the possibility to study semiconductor nanostructures with NMR techniques.
• Article: High-frequency EPR and ENDOR spectroscopy on semiconductor quantum dots

  P.G. Baranov, S.B. Orlinskii, C. de Mello Donega, Jan Schmidt
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  ABSTRACT: It is shown that high-frequency electron paramagnetic resonance (EPR) and electron-nuclear double resonance (ENDOR) spectroscopy are excellent tools for the investigation of the electronic properties of semiconductor quantum dots (QDs). The great attractions of these techniques are that, in contrast to optical methods, they allow the identification of the dopants and provide information about the spatial distribution of the electronic wave function. This latter aspect is particularly attractive because it allows for a quantitative measurement of the effect of confinement on the shape and properties of the wave function. In this contribution EPR and ENDOR results are presented on doped ZnO QDs. Shallow donors (SDs), related to interstitial Li and Na and substitutional Al atoms, have been identified in this material by pulsed high-frequency EPR and ENDOR spectroscopy. The shallow character of the wave function of the donors is evidenced by the multitude of ENDOR transitions of the (67)Zn nuclear spins and by the hyperfine interaction of the (7)Li, (23)Na and (27)Al nuclear spins that are much smaller than for atomic lithium, sodium and aluminium. The EPR signal of an exchange-coupled pair consisting of a shallow donor and a deep Na-related acceptor has been identified in ZnO nanocrystals with radii smaller than 1.5 nm. From ENDOR experiments it is concluded that the deep Na-related acceptor is located at the interface of the ZnO core and the Zn(OH)(2) capping layer, while the shallow donor is in the ZnO core. The spatial distribution of the electronic wave function of a shallow donor in ZnO semiconductor QDs has been determined in the regime of quantum confinement by using the nuclear spins as probes. Hyperfine interactions as monitored by ENDOR spectroscopy quantitatively reveal the transition from semiconductor to molecular properties upon reduction of the size of the nanoparticles. In addition, the effect of confinement on the g-factor of SDs in ZnO as well as in CdS QDs is observed. Finally, it is shown that an almost complete dynamic nuclear polarization (DNP) of the (67)Zn nuclear spins in the core of ZnO QDs and of the (1)H nuclear spins in the Zn(OH)(2) capping layer can be obtained. This DNP is achieved by saturating the EPR transition of SDs present in the QDs with resonant high-frequency microwaves at low temperatures. This nuclear polarization manifests itself as a hole and an antihole in the EPR absorption line of the SD in the QDs and a shift of the hole (antihole). The enhancement of the nuclear polarization opens the possibility to study semiconductor nanostructures with nuclear magnetic resonance techniques
• Article: Dynamical nuclear polarization and confinement effects in ZnO quantum dots

  P.G. Baranov, S.B. Orlinskii, D.M. Hofmann, C. de Mello Donega, A. Meijerink, Jan Schmidt
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  ABSTRACT: The spatial distribution of the electronic wave function of a shallow donor (SD) in a ZnO semiconductor quantum dots (QD's) has been determined in the regime of quantum confinement by using the nuclear spins as probes. Hyperfine (HF) interactions as monitored by electron nuclear double resonance spectroscopy quantitatively reveal the transition from semiconductor to molecular properties upon reduction of the size of the nanoparticles. Influence of confinement effect on g-factor value of SD's in ZnO and CdS QD's was displayed. The almost complete dynamic nuclear polarization (DNP) of nuclear spins has been demonstrated can be achieved in ZnO QD's by saturating the EPR transition of the SD present in the QD's with using high-frequency at low temperatures. Polarization of 67Zn nuclear spins in ZnO core and of 1H nuclear spins in the Zn(OH)2 capping layer have been obtained which manifests itself via the creation of a hole and an antihole in the EPR absorption line of the SD in QD's and a shift of the hole (antihole). The enhancement of the nuclear polarization opens the possibility to study semiconductor nanostructures with NMR techniques
• Article: A continuous-wave and pulsed electron spin resonance spectrometer operating at 275GHz

  H. Blok, J.A.J.M. Disselhorst, S.B. Orlinskii, J. Schmidt
  [show abstract] [hide abstract]
  ABSTRACT: An electron paramagnetic resonance (EPR) spectrometer is described which allows for continuous-wave and pulsed EPR experiments at 275 GHz (wavelength 1.1 mm). The related magnetic field of 9.9 T for g∼2 is supplied by a superconducting solenoid. The microwave bridge employs quasi-optical as well as conventional waveguide components. A cylindrical, single-mode cavity provides a high filling factor and a high sensitivity for EPR detection. Even with the available microwave power of 1 mW incident at the cavity a high microwave magnetic field B1 is obtained of about 0.1 mT which permits π/2-pulses as short as 100 ns. The performance of the spectrometer is illustrated with the help of spectra taken with several samples.
  Journal of Magnetic Resonance.
• Article: Giant change in the intensity of tunneling afterglow in excited ZnO quantum dots induced by the spin reorientation of electron-hole pairs in static and microwave magnetic fields

  P.G. Baranov, N G Romanov, D.O. Tolmachev, Celso de Mello Donegá, A. Meijerink, S.B. Orlinskii, J Schmidt
  [show abstract] [hide abstract]
  ABSTRACT: Long afterglow has been detected in light-excited ZnO quantum dots caused by the spin-dependent tunneling recombination of electron and hole centers. A giant increase in the intensity of afterglow upon a change in the spin orientation of electron and hole centers has been observed under electron paramagnetic resonance conditions, which allowed these centers to be identified.
• Source

  Available from: uu.nl

  Article: Donor-acceptor pairs in the confined structure of ZnO nanocrystals

  S.B. Orlinskii, Hubert Blok, J Schmidt, P.G. Baranov, Celso de Mello Donegá, A. Meijerink
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  ABSTRACT: The electron paramagnetic resonance signal of an exchange-coupled pair consisting of a shallow interstitial Li donor and a deep Na-related acceptor has been identified in ZnO nanocrystals with radii smaller than 1.5 nm. From electron nuclear double resonance experiments it is concluded that the deep Na-related acceptor is located at the interface of the ZnO core and the ZnOH2 capping layer, while the Li donor is in the ZnO core.