Pub Date : 2016-08-22DOI: 10.26713/JAMCNP.V3I2.316
A. Bhatia
In a recent publication by Modi et al. [Jour. of At. Mol. Cond. and Nano Phys. 2 (2015), 41], cross sections for the scattering of electrons and positrons from hydrogen atoms and molecules have been calculated in the Debye plasma, using the Born approximation. Using the exchange approximation for the scattering, it is shown here that at low energies they have considered, the cross sections for the triplet and the singlet states are not equal. Moreover, they differ considerably from their results.
{"title":"Comments on Scattering of Electrons/Positrons by H-atoms and H(_2) Molecules under Weakly Coupled Plasmas","authors":"A. Bhatia","doi":"10.26713/JAMCNP.V3I2.316","DOIUrl":"https://doi.org/10.26713/JAMCNP.V3I2.316","url":null,"abstract":"In a recent publication by Modi et al. [Jour. of At. Mol. Cond. and Nano Phys. 2 (2015), 41], cross sections for the scattering of electrons and positrons from hydrogen atoms and molecules have been calculated in the Debye plasma, using the Born approximation. Using the exchange approximation for the scattering, it is shown here that at low energies they have considered, the cross sections for the triplet and the singlet states are not equal. Moreover, they differ considerably from their results.","PeriodicalId":239838,"journal":{"name":"Journal of Atomic, Molecular, Condensate and Nano Physics","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122873150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-07-31DOI: 10.26713/JAMCNP.V3I2.463
Ranjit R. Borude, N. Deshpande, S. Chakane, J. Pant
Gas sensing is required in various fields like industries, environmental studies and space. Gas sensors based on change in resistance are widely in demand because of its low cost and high stability. Polyaniline (PANI) and Tin oxide (SnO(_2)) have been reported as good gas sensors. This has motivated us in studying the behavior and characteristics of composites of Sn-PANI. In this study we have synthesized Sn-PANI composite and characterized using FTIR, XRD and SEM as displayed. Sn-PANI composite is one such proposed gas sensor which has appreciable response to ammonia. The blending of SnO(_2) with PANI has greatly increased the sensitivity towards ammonia as compared to SnO(_2) sensors alone.
{"title":"Sn-PANI Synthesis and its Application as Ammonia Gas Sensor","authors":"Ranjit R. Borude, N. Deshpande, S. Chakane, J. Pant","doi":"10.26713/JAMCNP.V3I2.463","DOIUrl":"https://doi.org/10.26713/JAMCNP.V3I2.463","url":null,"abstract":"Gas sensing is required in various fields like industries, environmental studies and space. Gas sensors based on change in resistance are widely in demand because of its low cost and high stability. Polyaniline (PANI) and Tin oxide (SnO(_2)) have been reported as good gas sensors. This has motivated us in studying the behavior and characteristics of composites of Sn-PANI. In this study we have synthesized Sn-PANI composite and characterized using FTIR, XRD and SEM as displayed. Sn-PANI composite is one such proposed gas sensor which has appreciable response to ammonia. The blending of SnO(_2) with PANI has greatly increased the sensitivity towards ammonia as compared to SnO(_2) sensors alone.","PeriodicalId":239838,"journal":{"name":"Journal of Atomic, Molecular, Condensate and Nano Physics","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123117894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-07-30DOI: 10.26713/JAMCNP.V3I2.464
P. Kaur, A. Wasan
We present a theoretical model using density matrix approach to study the phenomenon of coherent population trapping (CPT) in the (Lambda)-type Doppler broadened system with multiple excited states. A multi-level (Lambda)-system is formed by considering the closely spaced hyperfine levels in the D2 line of (^{87})Rb. The presence of closely spaced hyperfine levels affects the transparency window and cause asymmetry in absorption profiles. We observe the sharp CPT dip when the frequency difference of applied fields is equal to the frequency separation between two ground levels. This dip demonstrates that the system is trapped in the dark state. By performing a thermal averaging in the Doppler-broadened (Lambda)-system, we have shown that the transparency window becomes narrower and its linewidth decreases at higher temperature. This study has potential applications in precision measurements due to the small linewidth of the transparency window.
{"title":"Coherent Population Trapping in An Inhomogeneously Broadened (Lambda)-System with Multiple Excited States","authors":"P. Kaur, A. Wasan","doi":"10.26713/JAMCNP.V3I2.464","DOIUrl":"https://doi.org/10.26713/JAMCNP.V3I2.464","url":null,"abstract":"We present a theoretical model using density matrix approach to study the phenomenon of coherent population trapping (CPT) in the (Lambda)-type Doppler broadened system with multiple excited states. A multi-level (Lambda)-system is formed by considering the closely spaced hyperfine levels in the D2 line of (^{87})Rb. The presence of closely spaced hyperfine levels affects the transparency window and cause asymmetry in absorption profiles. We observe the sharp CPT dip when the frequency difference of applied fields is equal to the frequency separation between two ground levels. This dip demonstrates that the system is trapped in the dark state. By performing a thermal averaging in the Doppler-broadened (Lambda)-system, we have shown that the transparency window becomes narrower and its linewidth decreases at higher temperature. This study has potential applications in precision measurements due to the small linewidth of the transparency window.","PeriodicalId":239838,"journal":{"name":"Journal of Atomic, Molecular, Condensate and Nano Physics","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124408110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-07-30DOI: 10.26713/JAMCNP.V3I2.462
S. Rai
The TiO(_{2}) nanoparticles doped with Ho(^{3+}) and Yb(^{3+}) ions were synthesized by sol gel method. The structure of the samples were characterized by XRD, TEM and by thermo gravimetric analysis. The average particle size of the TiO(_{2}) range from 7-10 nm (in diameter). The result obtained from TEM, XRD studies indicate that the rare earth ions were positioned in low phonon glass. The photoluminescence (PL) and upconversion (UC) properties of Ho(^{3+}) in various concentrations of TiO(_{2}) nanoparticles have been investigated. The PL and UC luminescence depends on particle size and crystal structure and we also observed that the emission of Ho(^{3+}) in silica xerogel was significantly depends on the amount of TiO(_{2}) nanoparticles.
{"title":"Structural and Optical Studies of Ho(^{3+})/yb(^{3+}) Co-Doped TiO(^{2}) Nanoparticles in Silica Glass","authors":"S. Rai","doi":"10.26713/JAMCNP.V3I2.462","DOIUrl":"https://doi.org/10.26713/JAMCNP.V3I2.462","url":null,"abstract":"The TiO(_{2}) nanoparticles doped with Ho(^{3+}) and Yb(^{3+}) ions were synthesized by sol gel method. The structure of the samples were characterized by XRD, TEM and by thermo gravimetric analysis. The average particle size of the TiO(_{2}) range from 7-10 nm (in diameter). The result obtained from TEM, XRD studies indicate that the rare earth ions were positioned in low phonon glass. The photoluminescence (PL) and upconversion (UC) properties of Ho(^{3+}) in various concentrations of TiO(_{2}) nanoparticles have been investigated. The PL and UC luminescence depends on particle size and crystal structure and we also observed that the emission of Ho(^{3+}) in silica xerogel was significantly depends on the amount of TiO(_{2}) nanoparticles.","PeriodicalId":239838,"journal":{"name":"Journal of Atomic, Molecular, Condensate and Nano Physics","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131421324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-07-15DOI: 10.26713/JAMCNP.V3I2.488
A. Ghosh, Khairul Islam, Suman B Mondal, Dipankar Bhattacharyya, A. Bandyopadhyay
A four-level inverted Y-type atomic system is subjected to three coherent laser fields simultaneously. The system has two closely spaced ground energy levels, one intermediate energy level and an uppermost energy level. Transition from the two ground levels to the intermediate level as well as from the intermediate level to the uppermost level are dipole allowed. Transition from the two ground energy levels to the uppermost level is dipole forbidden. A weak laser beam, known as the probe beam, acts between one of the ground levels and the intermediate level. A strong laser field, known as the control or pump field, couples the intermediate level with the uppermost level. A repump filed of intensity usually higher than the probe field acts between the other ground level and the intermediate level. The probe transmission through such a medium is investigated at different values of the control and repump Rabi frequencies under Doppler free condition as well as with thermal averaging. The nonradiative population transfer rates between the ground energy levels have been incorporated.
{"title":"A Study on Probe Transmission through an Inverted Y-type Atomic System in Presence of Three Coherent Laser Fields","authors":"A. Ghosh, Khairul Islam, Suman B Mondal, Dipankar Bhattacharyya, A. Bandyopadhyay","doi":"10.26713/JAMCNP.V3I2.488","DOIUrl":"https://doi.org/10.26713/JAMCNP.V3I2.488","url":null,"abstract":"A four-level inverted Y-type atomic system is subjected to three coherent laser fields simultaneously. The system has two closely spaced ground energy levels, one intermediate energy level and an uppermost energy level. Transition from the two ground levels to the intermediate level as well as from the intermediate level to the uppermost level are dipole allowed. Transition from the two ground energy levels to the uppermost level is dipole forbidden. A weak laser beam, known as the probe beam, acts between one of the ground levels and the intermediate level. A strong laser field, known as the control or pump field, couples the intermediate level with the uppermost level. A repump filed of intensity usually higher than the probe field acts between the other ground level and the intermediate level. The probe transmission through such a medium is investigated at different values of the control and repump Rabi frequencies under Doppler free condition as well as with thermal averaging. The nonradiative population transfer rates between the ground energy levels have been incorporated.","PeriodicalId":239838,"journal":{"name":"Journal of Atomic, Molecular, Condensate and Nano Physics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129854504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-01-17DOI: 10.26713/JAMCNP.V3I1.347
N. Deshpande, S. Chakane, Ranjit R. Borude
Conducting polymers have been attracting considerable attention of researchers worldwide since 1980, due to their unique electrical, optical, thermal and magnetic properties. Among these polymers, polyaniline (PAni) is most popular as it can be synthesized for specific applications like rechargeable batteries, bio-sensors, corrosion paintings, organic electronic materials, EMI shielding, light emitting diodes etc. In this paper, we report synthesis of conducting polyaniline using different dopants such as HCL, HCLO(_4), HNO(_3) and H(_2)SO(_4) by oxidative chemical polymerization of aniline. The synthesized polyaniline materials were characterized by Fourier Transform Infra-red Spectroscopy (FTIR), Powder X-Ray Diffraction (XRD), Energy Dispersive X-ray analysis (EDAX) and Ultra-Violate (UV-VIS) Spectroscopy techniques.
自1980年以来，导电聚合物由于其独特的电学、光学、热学和磁学性能而引起了全世界研究人员的广泛关注。在这些聚合物中，聚苯胺(PAni)是最受欢迎的，因为它可以合成用于可充电电池，生物传感器，防腐涂料，有机电子材料，EMI屏蔽，发光二极管等特定应用。本文报道了用不同的掺杂剂HCL、HCLO (_4)、HNO (_3)和H (_2) SO (_4)对苯胺进行氧化化学聚合合成导电聚苯胺。采用傅里叶变换红外光谱(FTIR)、粉末x射线衍射(XRD)、能量色散x射线分析(EDAX)和紫外可见光谱(UV-VIS)技术对合成的聚苯胺材料进行了表征。
{"title":"Synthesis and Characterization of Polyaniline, using Different Dopant, for Sensing Application of Pollutant Gases","authors":"N. Deshpande, S. Chakane, Ranjit R. Borude","doi":"10.26713/JAMCNP.V3I1.347","DOIUrl":"https://doi.org/10.26713/JAMCNP.V3I1.347","url":null,"abstract":"Conducting polymers have been attracting considerable attention of researchers worldwide since 1980, due to their unique electrical, optical, thermal and magnetic properties. Among these polymers, polyaniline (PAni) is most popular as it can be synthesized for specific applications like rechargeable batteries, bio-sensors, corrosion paintings, organic electronic materials, EMI shielding, light emitting diodes etc. In this paper, we report synthesis of conducting polyaniline using different dopants such as HCL, HCLO(_4), HNO(_3) and H(_2)SO(_4) by oxidative chemical polymerization of aniline. The synthesized polyaniline materials were characterized by Fourier Transform Infra-red Spectroscopy (FTIR), Powder X-Ray Diffraction (XRD), Energy Dispersive X-ray analysis (EDAX) and Ultra-Violate (UV-VIS) Spectroscopy techniques.","PeriodicalId":239838,"journal":{"name":"Journal of Atomic, Molecular, Condensate and Nano Physics","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132073546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-01-17DOI: 10.26713/JAMCNP.V3I1.345
Neha Aggarwal, A. Bhattacherjee, M. Mohan
We study the generation of atomic-squeezed states for a Bose-Einstein Condensate confined within the lossless optomechanical cavity using pondermotively squeezed light. We show that the radiation pressure coupling between the optical cavity field and mechanical motion of the cavity end mirror generates squeezing of light. This radiation pressure induced light squeezing gets transferred to the condensate atoms via Tavis-Cummings type interaction and results in squeezed-spin states. We further discuss the effect of optomechanical coupling on squeezed atomic states.
{"title":"Generation of Atomic-Squeezed States via Pondermotively Squeezed Light","authors":"Neha Aggarwal, A. Bhattacherjee, M. Mohan","doi":"10.26713/JAMCNP.V3I1.345","DOIUrl":"https://doi.org/10.26713/JAMCNP.V3I1.345","url":null,"abstract":"We study the generation of atomic-squeezed states for a Bose-Einstein Condensate confined within the lossless optomechanical cavity using pondermotively squeezed light. We show that the radiation pressure coupling between the optical cavity field and mechanical motion of the cavity end mirror generates squeezing of light. This radiation pressure induced light squeezing gets transferred to the condensate atoms via Tavis-Cummings type interaction and results in squeezed-spin states. We further discuss the effect of optomechanical coupling on squeezed atomic states.","PeriodicalId":239838,"journal":{"name":"Journal of Atomic, Molecular, Condensate and Nano Physics","volume":"18 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133444301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-01-17DOI: 10.26713/JAMCNP.V3I1.384
V. Prakash, Ruby Gupta, Vijayshri, Suresh C. Sharma
Electromagnetic surface waves are driven to instability on a conductor plasma interface via Cerenkov and fast cyclotron interaction by an electron beam. A dispersion relation and the growth rate of the instability for this process has been derived. Numerical calculations of the growth rate and unstable mode frequencies have been carried out for the typical parameters of the surface plasma waves. The plasma and beam responses are obtained using fluid treatment and the growth rate is obtained using the first-order perturbation theory. The growth rate increases with the beam density and scales as one-third power of the beam density in Cerenkov interaction and is proportional to the square root of beam density in fast cyclotron interaction. In addition, the real frequency of the unstable wave increases with the beam energy and scales as almost one half power of the beam energy. The effect of the plasma parameters and the strength of the external magnetic field on unstable frequencies and growth rates are analyzed.
{"title":"Excitation of Electromagnetic Surface Waves at A Conductor-Plasma Interface by An Electron Beam","authors":"V. Prakash, Ruby Gupta, Vijayshri, Suresh C. Sharma","doi":"10.26713/JAMCNP.V3I1.384","DOIUrl":"https://doi.org/10.26713/JAMCNP.V3I1.384","url":null,"abstract":"Electromagnetic surface waves are driven to instability on a conductor plasma interface via Cerenkov and fast cyclotron interaction by an electron beam. A dispersion relation and the growth rate of the instability for this process has been derived. Numerical calculations of the growth rate and unstable mode frequencies have been carried out for the typical parameters of the surface plasma waves. The plasma and beam responses are obtained using fluid treatment and the growth rate is obtained using the first-order perturbation theory. The growth rate increases with the beam density and scales as one-third power of the beam density in Cerenkov interaction and is proportional to the square root of beam density in fast cyclotron interaction. In addition, the real frequency of the unstable wave increases with the beam energy and scales as almost one half power of the beam energy. The effect of the plasma parameters and the strength of the external magnetic field on unstable frequencies and growth rates are analyzed.","PeriodicalId":239838,"journal":{"name":"Journal of Atomic, Molecular, Condensate and Nano Physics","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124761091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-01-17DOI: 10.26713/JAMCNP.V3I1.385
Ruby Gupta, V. Prakash, Suresh C. Sharma, Vijayshri, D. N. Gupta
The theory of whistler wave interaction with an ion beam injected parallel to the magnetic field in an unbounded plasma is considered. The excited whistler waves propagate parallel to the beam direction and their phase velocity is a characteristic of beam-whistler resonant cyclotron coupling. The frequency and the growth rate of the unstable wave increase with the relative density of negatively charged dust grains. The ion beam velocity responsible for maximum growth rate increases as the charge density carried by dust increases. The maximum value of growth rate increases with the beam density and is proportional to the square root of beam density. These results should shed light on mechanisms of whistler wave excitation in space plasmas by artificial beams injected from spacecraft in the ionosphere and the magnetosphere.
{"title":"Resonant Ion Beam Interaction with Whistler Waves in A Magnetized Dusty Plasma","authors":"Ruby Gupta, V. Prakash, Suresh C. Sharma, Vijayshri, D. N. Gupta","doi":"10.26713/JAMCNP.V3I1.385","DOIUrl":"https://doi.org/10.26713/JAMCNP.V3I1.385","url":null,"abstract":"The theory of whistler wave interaction with an ion beam injected parallel to the magnetic field in an unbounded plasma is considered. The excited whistler waves propagate parallel to the beam direction and their phase velocity is a characteristic of beam-whistler resonant cyclotron coupling. The frequency and the growth rate of the unstable wave increase with the relative density of negatively charged dust grains. The ion beam velocity responsible for maximum growth rate increases as the charge density carried by dust increases. The maximum value of growth rate increases with the beam density and is proportional to the square root of beam density. These results should shed light on mechanisms of whistler wave excitation in space plasmas by artificial beams injected from spacecraft in the ionosphere and the magnetosphere.","PeriodicalId":239838,"journal":{"name":"Journal of Atomic, Molecular, Condensate and Nano Physics","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115517988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-01-17DOI: 10.26713/JAMCNP.V3I1.386
M. Faizan, S. Ahmad
Europium trivalent (Eu(mbox{} ^{3+}), 2%) doped Y(_2)O(_3) nanophosphors were synthesized by solgel method and annealed at temperature 600 (^circ)C and 900 (^circ)C. The phosphors were characterized by XRD, FTIR, UV-visible and PL spectroscopy. The average crystal size was in the range of 10-26 nm. FTIR spectra show that the intensities of all impurity peaks get reduce with increasing annealing temperature. The band gap was determined from the diffuse reflectance (DR) spectra using the K-M function. The photoluminescence spectra were describe by well known (rm ^5D_0)-(rm ^7F_j) transitions ((J=0,1,2,3,4)) of Eu(^{3+}) ions.
三价铕(Eu (mbox{} ^{3+}), 2%) doped Y(_2)O(_3) nanophosphors were synthesized by solgel method and annealed at temperature 600 (^circ)C and 900 (^circ)C. The phosphors were characterized by XRD, FTIR, UV-visible and PL spectroscopy. The average crystal size was in the range of 10-26 nm. FTIR spectra show that the intensities of all impurity peaks get reduce with increasing annealing temperature. The band gap was determined from the diffuse reflectance (DR) spectra using the K-M function. The photoluminescence spectra were describe by well known (rm ^5D_0)-(rm ^7F_j) transitions ((J=0,1,2,3,4)) of Eu(^{3+}) ions.
{"title":"Structure and Luminescence Properties of Y(_2)O(_3): Eu(^{3+}) Nanophosphors","authors":"M. Faizan, S. Ahmad","doi":"10.26713/JAMCNP.V3I1.386","DOIUrl":"https://doi.org/10.26713/JAMCNP.V3I1.386","url":null,"abstract":"Europium trivalent (Eu(mbox{} ^{3+}), 2%) doped Y(_2)O(_3) nanophosphors were synthesized by solgel method and annealed at temperature 600 (^circ)C and 900 (^circ)C. The phosphors were characterized by XRD, FTIR, UV-visible and PL spectroscopy. The average crystal size was in the range of 10-26 nm. FTIR spectra show that the intensities of all impurity peaks get reduce with increasing annealing temperature. The band gap was determined from the diffuse reflectance (DR) spectra using the K-M function. The photoluminescence spectra were describe by well known (rm ^5D_0)-(rm ^7F_j) transitions ((J=0,1,2,3,4)) of Eu(^{3+}) ions.","PeriodicalId":239838,"journal":{"name":"Journal of Atomic, Molecular, Condensate and Nano Physics","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125571277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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