Zeszyty

Zeszyty czasopisma

AHEAD OF PRINT

Tom 40 (2022): Zeszyt 2 (August 2022)

Tom 40 (2022): Zeszyt 1 (March 2022)

Tom 39 (2021): Zeszyt 4 (December 2021)

Tom 39 (2021): Zeszyt 3 (September 2021)

Tom 39 (2021): Zeszyt 2 (June 2021)

Tom 39 (2021): Zeszyt 1 (March 2021)

Tom 38 (2020): Zeszyt 4 (December 2020)

Tom 38 (2020): Zeszyt 3 (September 2020)

Tom 38 (2020): Zeszyt 2 (June 2020)

Tom 38 (2020): Zeszyt 1 (March 2020)

Tom 37 (2019): Zeszyt 4 (December 2019)

Tom 37 (2019): Zeszyt 3 (September 2019)

Tom 37 (2019): Zeszyt 2 (June 2019)

Tom 37 (2019): Zeszyt 1 (March 2019)

Tom 36 (2018): Zeszyt 4 (December 2018)

Tom 36 (2018): Zeszyt 3 (September 2018)

Tom 36 (2018): Zeszyt 2 (June 2018)

Tom 36 (2018): Zeszyt 1 (March 2018)

Tom 35 (2017): Zeszyt 4 (December 2017)

Tom 35 (2017): Zeszyt 3 (October 2017)

Tom 35 (2017): Zeszyt 2 (July 2017)

Tom 35 (2017): Zeszyt 1 (March 2017)

Tom 34 (2016): Zeszyt 4 (December 2016)

Tom 34 (2016): Zeszyt 3 (September 2016)

Tom 34 (2016): Zeszyt 2 (June 2016)

Tom 34 (2016): Zeszyt 1 (March 2016)

Tom 33 (2015): Zeszyt 4 (December 2015)

Tom 33 (2015): Zeszyt 3 (September 2015)

Tom 33 (2015): Zeszyt 2 (June 2015)

Tom 33 (2015): Zeszyt 1 (March 2015)

Tom 32 (2014): Zeszyt 4 (December 2014)

Tom 32 (2014): Zeszyt 3 (September 2014)

Tom 32 (2014): Zeszyt 2 (June 2014)

Tom 32 (2014): Zeszyt 1 (January 2014)

Tom 31 (2013): Zeszyt 4 (October 2013)

Tom 31 (2013): Zeszyt 3 (August 2013)

Tom 31 (2013): Zeszyt 2 (April 2013)

Tom 31 (2013): Zeszyt 1 (January 2013)

Tom 30 (2012): Zeszyt 4 (December 2012)

Tom 30 (2012): Zeszyt 3 (September 2012)

Tom 30 (2012): Zeszyt 2 (June 2012)

Tom 30 (2012): Zeszyt 1 (March 2012)

Tom 29 (2011): Zeszyt 4 (December 2011)

Tom 29 (2011): Zeszyt 3 (September 2011)

Tom 29 (2011): Zeszyt 2 (June 2011)

Tom 29 (2011): Zeszyt 1 (March 2011)

Informacje o czasopiśmie
Format
Czasopismo
eISSN
2083-134X
Pierwsze wydanie
16 Apr 2011
Częstotliwość wydawania
4 razy w roku
Języki
Angielski

Wyszukiwanie

AHEAD OF PRINT

Informacje o czasopiśmie
Format
Czasopismo
eISSN
2083-134X
Pierwsze wydanie
16 Apr 2011
Częstotliwość wydawania
4 razy w roku
Języki
Angielski

Wyszukiwanie

5 Artykułów
Otwarty dostęp

Growth, spectral, optical, dielectric and third order nonlinear studies on 2-amino 4-methylpyridinium salicylate single crystals

Data publikacji: 10 Jan 2020
Zakres stron: -

Abstrakt

Abstract

Optically transparent single crystals of 2-amino 4-methylpyridinium salicylate were successfully grown by slow evaporation solution growth technique at room temperature. The grown crystal was characterized by various characterization techniques such as single crystal X-ray diffraction, Fourier transform infrared microscopy, optical, dielectric and Z-scan studies. The presence of various functional groups was identified by Fourier transform infrared technique. UV-Vis-NIR studies implied the absence of absorption in the visible region. Dielectric studies were carried out in the frequency range from 50 Hz to 5 MHz. Thermogravimetric/differential thermal analysis and nuclear magnetic resonance spectra studies were also performed for the grown crystal. Nonlinear refractive index, absorption coefficient and third order nonlinear optical susceptibility of the crystals were evaluated by Z-scan studies.

Słowa kluczowe

  • crystal growth
  • nonlinear
  • dielectric
  • thermal
Otwarty dostęp

Studies on new material: carbon dot-graphene oxide-zinc oxide nanocomplex

Data publikacji: 30 Dec 2019
Zakres stron: -

Abstrakt

Abstract

In the present work, with an aim of developing new useful materials, carbon dot-graphene oxide-zinc oxide (CGZ) nanocomplexes were synthesized by the wet chemical method. Structure, morphology and chemical composition of prepared GCZ nanoparticles were determined by carrying out X-ray diffraction, scanning electron microscopy, Fourier transform infrared and energy dispersive X-ray absorption spectral measurements. The strong absorption band observed in the UV region for the prepared samples can be attributed to the band edge absorption. The dielectric parameters, viz. dielectric constant (∈r), dielectric loss (tanδ) and AC electrical conductivity (σ AC) were determined at various temperatures in the range of 30 °C to 150 °C at two different frequencies (100 Hz and 1 kHz). DC conductivity (σDC) measurement was also carried out at various temperatures in the range of 30 °C to 150 °C. In addition, the enhanced photocatalytic activity of CGZ has been explained and the mechanism elucidating the excellent performance of CGZ has been proposed.

Słowa kluczowe

  • graphene oxide based nanocomplexes
  • X-ray diffraction
  • electron microscopy
  • spectroscopy
  • optical properties
  • electrical properties
Otwarty dostęp

An insight on spectral, microstructural, electrical and mechanical characterization of ammonium oxalate monohydrate crystals

Data publikacji: 28 Jan 2020
Zakres stron: -

Abstrakt

Abstract

Single crystals of ammonium oxalate monohydrate (AO) were grown using the slow evaporation solution growth technique. The cell parameters obtained from the single crystal diffraction experiments matched with those known earlier showed that the grown crystals were composed of AO. The variation of dielectric constant as a function of frequency shows that the dielectric constant is relatively high in low frequency region and low in the high frequency region. Microhardness study indicates that the grown AO crystal is of a soft nature. The TG and DTA studies reveal that the grown crystal has good thermal stability and can be exploited in various applications up to 100 °C. There is a change in morphology of etch pits on prolonged etching. A very low value of dielectric constant supports that the material can be exploited in photonic and electro-optic devices. Thermal stability of the grown crystal is good.

Słowa kluczowe

  • etching
  • dielectric constant
  • microhardness study
  • single crystal
Otwarty dostęp

Growth, spectroscopic, electrical and mechanical studies on hexamethylenetetramine succinate crystal: a new third harmonic generation material

Data publikacji: 10 Jan 2020
Zakres stron: -

Abstrakt

Abstract

Hexamethylenetetramine succinate was synthesized and good quality single crystals with the size of 14 mm × 6 mm × 4 mm were grown by the slow evaporation solution growth technique at room temperature. The single crystal XRD revealed that the grown crystal belongs to the monoclinic system with the space group of P21/c. The presence of functional groups in the crystal was identified using FT-IR technique. The optical behavior was examined through UV-Vis-NIR studies. The photoconductivity study exhibited the positive photoconductivity nature of the grown crystal. Microhardness studies revealed the soft nature of the crystal. The nonlinear refractive index (n2), nonlinear absorption coefficient (β) and third order nonlinear optical susceptibility χ(3) of the crystals were measured by Z-scan studies.

Słowa kluczowe

  • optical materials
  • crystal growth
  • X-ray diffraction
  • mechanical properties
Otwarty dostęp

Stereometric analysis of Ta2O5 thin films

Data publikacji: 10 Jan 2020
Zakres stron: -

Abstrakt

Abstract

The purpose of this work is the study of the correlation between the thickness of tantalum pentoxide thin films and their three-dimensional (3D) micromorphology. The samples were prepared on silicon substrates by electron beam evaporation. The differences in surface structure of the processed and reference samples were investigated. Compositional studies were performed by energy-dispersive X-ray spectroscopy. Stereometric analysis was carried out on the basis of atomic force microscopy (AFM) data, for tantalum pentoxide samples with 20 nm, 40 nm, 60 nm, 80 nm and 100 nm thicknesses. These methods are frequently used in describing experimental data of surface nanomorphology of Ta2O5. The results can be used to validate theoretical models for prediction or correlation of nanotexture surface parameters.

Słowa kluczowe

  • atomic force microscopy
  • stereometric analysis
  • TaO
  • topography
5 Artykułów
Otwarty dostęp

Growth, spectral, optical, dielectric and third order nonlinear studies on 2-amino 4-methylpyridinium salicylate single crystals

Data publikacji: 10 Jan 2020
Zakres stron: -

Abstrakt

Abstract

Optically transparent single crystals of 2-amino 4-methylpyridinium salicylate were successfully grown by slow evaporation solution growth technique at room temperature. The grown crystal was characterized by various characterization techniques such as single crystal X-ray diffraction, Fourier transform infrared microscopy, optical, dielectric and Z-scan studies. The presence of various functional groups was identified by Fourier transform infrared technique. UV-Vis-NIR studies implied the absence of absorption in the visible region. Dielectric studies were carried out in the frequency range from 50 Hz to 5 MHz. Thermogravimetric/differential thermal analysis and nuclear magnetic resonance spectra studies were also performed for the grown crystal. Nonlinear refractive index, absorption coefficient and third order nonlinear optical susceptibility of the crystals were evaluated by Z-scan studies.

Słowa kluczowe

  • crystal growth
  • nonlinear
  • dielectric
  • thermal
Otwarty dostęp

Studies on new material: carbon dot-graphene oxide-zinc oxide nanocomplex

Data publikacji: 30 Dec 2019
Zakres stron: -

Abstrakt

Abstract

In the present work, with an aim of developing new useful materials, carbon dot-graphene oxide-zinc oxide (CGZ) nanocomplexes were synthesized by the wet chemical method. Structure, morphology and chemical composition of prepared GCZ nanoparticles were determined by carrying out X-ray diffraction, scanning electron microscopy, Fourier transform infrared and energy dispersive X-ray absorption spectral measurements. The strong absorption band observed in the UV region for the prepared samples can be attributed to the band edge absorption. The dielectric parameters, viz. dielectric constant (∈r), dielectric loss (tanδ) and AC electrical conductivity (σ AC) were determined at various temperatures in the range of 30 °C to 150 °C at two different frequencies (100 Hz and 1 kHz). DC conductivity (σDC) measurement was also carried out at various temperatures in the range of 30 °C to 150 °C. In addition, the enhanced photocatalytic activity of CGZ has been explained and the mechanism elucidating the excellent performance of CGZ has been proposed.

Słowa kluczowe

  • graphene oxide based nanocomplexes
  • X-ray diffraction
  • electron microscopy
  • spectroscopy
  • optical properties
  • electrical properties
Otwarty dostęp

An insight on spectral, microstructural, electrical and mechanical characterization of ammonium oxalate monohydrate crystals

Data publikacji: 28 Jan 2020
Zakres stron: -

Abstrakt

Abstract

Single crystals of ammonium oxalate monohydrate (AO) were grown using the slow evaporation solution growth technique. The cell parameters obtained from the single crystal diffraction experiments matched with those known earlier showed that the grown crystals were composed of AO. The variation of dielectric constant as a function of frequency shows that the dielectric constant is relatively high in low frequency region and low in the high frequency region. Microhardness study indicates that the grown AO crystal is of a soft nature. The TG and DTA studies reveal that the grown crystal has good thermal stability and can be exploited in various applications up to 100 °C. There is a change in morphology of etch pits on prolonged etching. A very low value of dielectric constant supports that the material can be exploited in photonic and electro-optic devices. Thermal stability of the grown crystal is good.

Słowa kluczowe

  • etching
  • dielectric constant
  • microhardness study
  • single crystal
Otwarty dostęp

Growth, spectroscopic, electrical and mechanical studies on hexamethylenetetramine succinate crystal: a new third harmonic generation material

Data publikacji: 10 Jan 2020
Zakres stron: -

Abstrakt

Abstract

Hexamethylenetetramine succinate was synthesized and good quality single crystals with the size of 14 mm × 6 mm × 4 mm were grown by the slow evaporation solution growth technique at room temperature. The single crystal XRD revealed that the grown crystal belongs to the monoclinic system with the space group of P21/c. The presence of functional groups in the crystal was identified using FT-IR technique. The optical behavior was examined through UV-Vis-NIR studies. The photoconductivity study exhibited the positive photoconductivity nature of the grown crystal. Microhardness studies revealed the soft nature of the crystal. The nonlinear refractive index (n2), nonlinear absorption coefficient (β) and third order nonlinear optical susceptibility χ(3) of the crystals were measured by Z-scan studies.

Słowa kluczowe

  • optical materials
  • crystal growth
  • X-ray diffraction
  • mechanical properties
Otwarty dostęp

Stereometric analysis of Ta2O5 thin films

Data publikacji: 10 Jan 2020
Zakres stron: -

Abstrakt

Abstract

The purpose of this work is the study of the correlation between the thickness of tantalum pentoxide thin films and their three-dimensional (3D) micromorphology. The samples were prepared on silicon substrates by electron beam evaporation. The differences in surface structure of the processed and reference samples were investigated. Compositional studies were performed by energy-dispersive X-ray spectroscopy. Stereometric analysis was carried out on the basis of atomic force microscopy (AFM) data, for tantalum pentoxide samples with 20 nm, 40 nm, 60 nm, 80 nm and 100 nm thicknesses. These methods are frequently used in describing experimental data of surface nanomorphology of Ta2O5. The results can be used to validate theoretical models for prediction or correlation of nanotexture surface parameters.

Słowa kluczowe

  • atomic force microscopy
  • stereometric analysis
  • TaO
  • topography

Zaplanuj zdalną konferencję ze Sciendo