Cr3+ doped Al2O3 nanoparticles: Effect of Cr3+ content in intensifying red emission

다국어 초록 (Multilingual Abstract)

Cr3+-doped α-Al2O3 nanoparticles (Al2􀀀 xCrxO3, 0.005 ≤ x ≤ 0.05) were synthesized by co-precipitation method.
X-ray diffraction (XRD) patterns of Cr3+:Al2O3 nanoparticles revealed the crystallite size of ~53 nm and electron microscopy (SEM & TEM) confirmed the spherical nanoparticle formation. Diffuse reflectance spectra (DRS) displayed peaks at 406 and 558 nm corresponding to the Cr3+ transitions which became prominent with the increase in Cr3+ concentration which was also evidenced by the gradually increasing pink coloration of the samples. Photoluminescence (PL) studies showed the sharp red emission at 694 nm (ruby line) which was observed for all samples. The Dq/B value for all samples was found to be greater than 2.3 confirming the presence of Cr3+ ions in the octahedral sites. Chromaticity diagrams displayed the maximum red appearance for the sample with x = 0.01 and a lifetime of 4 ms. The synthesized Cr3+:Al2O3 nanoparticles with smaller crystallite sizes and narrow near monochromatic emission can be used in various applications including sensing, lasing, and bioimaging applications.

참고문헌 (Reference)

1 H. Y. Zhu, "γ-alumina nanofibers prepared from aluminum hydrate with poly(ethylene oxide)surfactant" 14 : 2086-, 2002

2 T. Zaki, "Using modified Pechini method to synthesize α-Al2O3 nanoparticles of high surface area" 38 : 4861-, 2012

3 H. M. Reinhardt, "Transformation of anodic aluminum oxide to nanoporous α-Al2O3, ruby and Ti-sapphire micropatterns" 33 : 1281-, 2013

4 W. Tian, "Three body abrasive wear characteristics of plasma sprayed conventional and nanostructured Al2O3-13%TiO2 coatings" 43 : 876-, 2010

5 S. Mahalingam, "Thermal stability of rare earthPYSZ thermal barrier coating with high-resolution transmission electron microscopy" 10 : 2020

6 Q. Liu, "The thermoluminescence and optically stimulated luminescence properties of Cr-doped alpha alumina transparent ceramics" 579 : 259-, 2013

7 A. van Zyl, "The synthesis of beta alumina from aluminium hydroxide and oxyhydroxide precursors" 28 : 145-, 1993

8 D. K. Nguyen, "Synthesis of Cr-doped Al2O3 by Pechini sol-gel method and its application for reversible thermochromic sensors" 223 : 708-, 2019

9 Li, "Synthesis and structure characterization of chromium oxide prepared by solid thermal decomposition reaction" 110 : 178-, 2006

10 J. M. McHale, "Surface energies and thermodynamic phase stability in nanocrystalline aluminas" 277 : 788-, 1997

11 B. C. Lippens, "Study of phase transformations during calcination of aluminum hydroxides by selected area electron diffraction" 17 : 1312-, 1964

12 P. S. Santos, "Standard transition aluminas. Electron microscopy studies" 3 : 104-, 2000

13 R. Shannon, "Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides" 32 : 751-, 1976

14 F. Bondioli, "Reaction mechanism in alumina/chromia(Al2O3–Cr2O3)solid solutions obtained by coprecipitation" 83 : 2036-, 2000

15 S. G. Menon, "Rapid annealing : a novel processing technique for Cr : ZnAl2O4 nanoparticles" 728 : 484-, 2017

16 T. Zaki, "Preparation of high pure α-Al2O3 nanoparticles at low temperatures using Pechini method" 38 : 2021-, 2012

17 X. Mi, "Preparation and luminescent properties of Cr3+: Al2O3 nano-powders by low-temperature combustion synthesis" 20 : 164-, 2009

18 T. Toyoda, "Photoluminescence spectroscopy of Cr3+ in ceramic Al2O3" 54 : 33-, 1998

19 Z. Zhu, "Photoluminescence properties of Tb3+ doped Al2O3 microfibers via a hydrothermal route followed by heat treatment" 38 : 4137-, 2012

20 X. Peng, "Photoluminescence and infrared properties of α-Al2O3 nanowires and nanobelts" 106 : 11163-, 2002

21 G. Salek, "Optical properties versus temperature of Cr-doped γ-and α-Al2O3 : irreversible thermal sensors application" 179 : 189-, 2016

22 I. Levin, "Metastable alumina polymorphs: crystal structures and transition sequences" 81 : 1995-, 1998

23 D. Osso, "Mechanical-thermal synthesis of Al2O3-Cr composite powders" 15 : 1207-, 1995

24 G. F. Albrecht, "Measurements of Ti3+ : Al2O3 as a lasing material" 52 : 401-, 1985

25 J. -C. Woo, "Low leakage current in metal-insulatormetal capacitors of structural Al2O3/TiO2/Al2O3 dielectrics" 100 : 081101-, 2012

26 B. Vermang, "Integration of Al2O3 as front and rear surface passivation for large-area screenprinted p-type Si PERC" 27 : 325-, 2012

27 C. Feldmann, "Inorganic Luminescent Materials: 100 Years of Research and Application" Wiley 13 (13): 511-516, 2003

28 J.E. Huheey, "Inorganic Chemistry: Principles of Structure and Reactivity" Pearson Education India 433-459, 2006

29 H. Xuanmeng, "In-situ Cr-doped alumina nanorods powder prepared by hydrothermal method" 45 : 1659-, 2016

30 A. Pillonnet, "Fluorescence of Cr3+ doped alumina optical waveguides prepared by pulsed laser deposition and sol–gel method" 87–89 : 1087-, 2000

31 L. Xu, "Facile synthesis of nano-crystalline alpha-alumina at low temperature via an absolute ethanol sol–gel strategy" 132 : 1071-, 2012

32 S. G. Menon, "Facile synthesis and luminescence studies of nanocrystalline red emitting Cr:ZnAl2O4phosphor" 86 : 63-, 2017

33 Z. Zhu, "Fabrication and luminescent properties of Al2O3: Cr3+ microspheres via a microwave solvothermal route followed by heat treatment" 285 : 3140-, 2012

34 K. Choudhari, "Fabrication and high-temperature structural characterization study of porous anodic alumina membranes" 19 : 1053-, 2012

35 H. Huang, "Enhanced polarization in tadpole-shaped (Ni, Al)/AlN nanoparticles and microwave absorption at high frequencies" 34 : 31-, 2011

36 D. Liu, "Effects of Cr content and morphology on the luminescence properties of the Cr-doped alpha-Al2O3 powders" 39 : 4765-, 2013

37 Y. Cai, "Effect of surface treatment on electrical properties of GaN metal–insulator–semiconductor devices with Al2O3 gate dielectric" 59 : 041001-, 2020

38 A. Patra, "Effect of crystal structure and dopant concentration on the luminescence of Cr3+ in Al2O3 nanocrystals" 27 : 1396-, 2005

39 S. Karthik H, "Effect of Zn substitution in Cr3+ doped MgAl2O4 mixed spinel nanoparticles on red/NIR emission properties" 111 : 294-, 2019

40 D. -H. Riu, "Effect of Cr2O3 addition on microstructural evolution and mechanical properties of Al2O3" 20 : 1475-, 2000

41 M. Ahmed, "Dosimetric properties of Cr doped Al2O3 nanophosphors" 196 : 449-, 2018

42 V. K. Sreenivasan, "Development of bright and biocompatible nanoruby and its application to background-free time-gated imaging of G-protein-coupled receptors" 9 : 39197-, 2017

43 K.S. Choudhari, "Cr3+ doped nanoporous anodic alumina: Facile microwave assisted doping to realize nanoporous ruby and phase dependent photoluminescence" Elsevier BV 45 (45): 12130-12137, 2019

44 J. M. A. Caiut, "Cr3+ doped Al2O3 obtained by nonhydrolytic sol-gel methodology" 30 : 744-, 2019

45 D. N. Hebbar, "Cr-doped ZnAl2O4 : microwave solution route for ceramic nanoparticles from metalorganic complexes in minutes" 101 : 800-, 2018

46 C. Zeng, "Coupling effect of chromia doping and vacuum on the phase transition of alumina prepared by co-precipitation process" 294 : 284-, 2016

47 R. Ianoș, "Combustion synthesis of pink chromium-doped alumina with excellent near-infrared reflective properties" 43 : 2568-, 2017

48 M. Hossein-Zadeh, "Characterization of properties of Al–Al2O3 nano-composite synthesized via milling and subsequent casting" 25 : 75-, 2013

49 M. del Carmen Prieto, "Characterization of coprecipitated Fe2O3–Al2O3 powders" 4 : 1123-, 1994

50 S. Goel, "Axial suspension plasma spraying of Al2O3 coatings for superior tribological properties" 315 : 80-, 2017

51 R. J. Narayan, "Atomic layer deposition of TiO2 thin films on nanoporous alumina templates : medical applications" 61 : 12-, 2009

52 M. Casalboni, "An optical study of silicate glass containing and ions" 8 : 9059-, 1996