Pub Date : 2020-06-10DOI: 10.31257/2018/jkp/2020/120103
B. Alshafaay, Hadi J. M. Al-Agealy, M. A. Hassooni
The purpose of this research is study the heterogeneous electronic transition through metal/liquid interface using simple model. The kinetic of electron transfer phenomenon discussion using postulate of quantum transition theory. The energy levels for metal and liquid assume to be alignment depending on continuum model theory. The behavour of electron transfer at metal-liquid interface affected by barrier height. The transition of negative charge on the interface of metal /liquid which suffering much more impediment to transfer cross the potential barrier .The net of electron that transfer give the average rate of electronic transfer and it indicate the electrical properties of metal/liquid devices.
{"title":"Theoretical Study of Heterogeneous Electronic Transition Rate at the Metal/ Ionic Liquid Interface Using Quantum Theory","authors":"B. Alshafaay, Hadi J. M. Al-Agealy, M. A. Hassooni","doi":"10.31257/2018/jkp/2020/120103","DOIUrl":"https://doi.org/10.31257/2018/jkp/2020/120103","url":null,"abstract":"The purpose of this research is study the heterogeneous electronic transition through metal/liquid interface using simple model. The kinetic of electron transfer phenomenon discussion using postulate of quantum transition theory. The energy levels for metal and liquid assume to be alignment depending on continuum model theory. The behavour of electron transfer at metal-liquid interface affected by barrier height. The transition of negative charge on the interface of metal /liquid which suffering much more impediment to transfer cross the potential barrier .The net of electron that transfer give the average rate of electronic transfer and it indicate the electrical properties of metal/liquid devices.","PeriodicalId":16215,"journal":{"name":"Journal of Kufa - Physics","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81481497","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 : 2020-06-10DOI: 10.31257/2018/jkp/2020/120105
Abbas F. Nori, F. Mohammed
In this work comparison between the results of the first systems is a fixed solar and the second is the sun tracking in an attempt to increase the proportion of electricity production. Here a microcontroller (Arduino) and the light-dependent resistor (LDR) photo detector is used in this tracker. And then compare the results in different weather conditions and on different days to test the efficiency of the two systems. The efficiency of the tracking system is better than the fixed system by 12.3% on a sunny day and 4.9% on a partly cloudy day. However, it failed by 3.3% on a cloudy day. With a sunny day preference in the tracking system at 6.9% of partially cloudy days, and 12.1% with partially cloudy to a cloudy day. And verified from The efficiency of the work of the microcontroller (Arduino) system and the optical detector (LDR).
{"title":"A Prototype solar tracking system design and implementation","authors":"Abbas F. Nori, F. Mohammed","doi":"10.31257/2018/jkp/2020/120105","DOIUrl":"https://doi.org/10.31257/2018/jkp/2020/120105","url":null,"abstract":"In this work comparison between the results of the first systems is a fixed solar and the second is the sun tracking in an attempt to increase the proportion of electricity production. Here a microcontroller (Arduino) and the light-dependent resistor (LDR) photo detector is used in this tracker. And then compare the results in different weather conditions and on different days to test the efficiency of the two systems. The efficiency of the tracking system is better than the fixed system by 12.3% on a sunny day and 4.9% on a partly cloudy day. However, it failed by 3.3% on a cloudy day. With a sunny day preference in the tracking system at 6.9% of partially cloudy days, and 12.1% with partially cloudy to a cloudy day. And verified from The efficiency of the work of the microcontroller (Arduino) system and the optical detector (LDR).","PeriodicalId":16215,"journal":{"name":"Journal of Kufa - Physics","volume":"59 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84598638","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 : 2020-04-05DOI: 10.29350/qjps.2020.25.2.1082
A. Khilkhal, A. A. Khadayeir
In this paper a Cu2O thin films, were deposited using RF sputtering technique. Sputtering process can be defined as ejection atoms of material surface due to positive ions bombardment of (mostly) inert gas, sometimes called cathode sputtering. Then the thin films were characterized by XRD. The results obtained showed that, the thin films had a polycrystalline structure with cubic lattice unit cell. strongest peak was seen at 61.3967 degree, and FWHM was at 0.215 degree, while lattice constant was 4.26 Aº. The average grain size was 44.87 nm. While AFM analysis showed that the increasing of four samples temperature (523, 573, 623 and 673) Kelvin, led to increase of roughness average from (3.39 to 9.2) nm, and ten points height from (13.7 to 36.3). On the other hand granularity cumulation distribution charts showed that the average diameter was varied from (43.31 to 51.28) nm with grain numbers ( 739, to 414) respectively
{"title":"Structural behavior of RF magnetron sputtered cuprous oxide (Cu2O) films","authors":"A. Khilkhal, A. A. Khadayeir","doi":"10.29350/qjps.2020.25.2.1082","DOIUrl":"https://doi.org/10.29350/qjps.2020.25.2.1082","url":null,"abstract":"In this paper a Cu2O thin films, were deposited using RF sputtering technique. Sputtering process can be defined as ejection atoms of material surface due to positive ions bombardment of (mostly) inert gas, sometimes called cathode sputtering. Then the thin films were characterized by XRD. The results obtained showed that, the thin films had a polycrystalline structure with cubic lattice unit cell. strongest peak was seen at 61.3967 degree, and FWHM was at 0.215 degree, while lattice constant was 4.26 Aº. The average grain size was 44.87 nm. While AFM analysis showed that the increasing of four samples temperature (523, 573, 623 and 673) Kelvin, led to increase of roughness average from (3.39 to 9.2) nm, and ten points height from (13.7 to 36.3). On the other hand granularity cumulation distribution charts showed that the average diameter was varied from (43.31 to 51.28) nm with grain numbers ( 739, to 414) respectively","PeriodicalId":16215,"journal":{"name":"Journal of Kufa - Physics","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90714424","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 : 2019-12-24DOI: 10.31257/2018/jkp/2019/110201
Hadeel H. Abed, A. K. Hasan
Article history: Received: 20 MAR., 2019 Accepted: 10 GUN, 2019 Available Online: 24 DEC, 2019 In this study, the shell model used to calculate energy levels and reduced electric quadruple transition probability B(E2) for 18 Ne isotope using OXBASH code within the sd shell and using the KUOSD effective interaction. 18 Ne isotope contain two proton outside 16 O core in shell (0d5/2, 1s1/2, and 0d3/2) .The results of the energy levels and values of B(E2) were reasonably consistent with the experimental data available. DOI: http://dx.doi.org/10.31257/2018/JKP/2019/110201 K e y w o r d s : OXBASH Code Ne isotope Energy Levels B(E2) ـل يوونلا بيكرتلا تساردل يوونلا ةرشقلا جذومنأ قيبطت 18 Ne شابسكوأ دوك لامعتساب نسح فلخ يلع دبع مكاح ليده ءاٌزٍفلا مسق ,خاىثلل حٍتزرلا حٍلك , حفوكلا حعماج :حٍحارفملا خاملكلا لا ــــ خ ـــ صلا ـــ ح شاثسكوا دوك زٍظو 18 Ne , حقاطلا خاٌورسم ً اةةةةةةةتز كلا اةةةةةةةهرواا حةةةةةةةٍلامرحا حلزرخملا ً اةتز كلا ةةطهلا ًااةتزل اةهرواا حةٍلامرحاو حقاطلا خاٌورسم باسح مذ حسارذلا يذه ًف حةلزرخملا B(E2) زةٍظىل 18 Ne دوةك امعرةسات OXBASH جزةرهلا همةض sd امعرةساو اعفلا لاافرلا KUOSD زٍظو نأ ثٍح 18 Ne ةةلهلا راةخ هٍووذوزت ىلا يورحٌ 16 O ) جزةرهلا ًةف 0 d5/2, 1s1/2, and 0d3/2 ) اةهرواا حةٍلامرحاو حةقاطلا خاٌورةسم مٍةق دةواك . B(E2) جزفورملا حٍلمعلا مٍهلا عم وهعم لكرت قفرذ . JOURNAL OF KUFA–PHYSICS | Vol. 11, No. 2 December (2019) Hadeel H. Abed, Ali k. Hasan 2 nucleus. Shell model is one of the most prominent and successful nuclear models[1]. One of the central challenges in nuclear physics understanding on the nuclear structure is choosing the correct effective interaction and model space that can lead to predicting a wide range of observation from the nuclear shell model systematically and correctly[2]. The nuclear shell model is one of the most powerful tools to give a quantitative interpretation of the empirical data. The two central ingredients of any calculation of the shell model are the N-N interaction and configuration space for valence particles. In principle, one can implement calculations of shell models with realistic N-N interaction in an indefinite configuration space or with effective renormalized interaction restricted configuration space[3]. The calculations of the shell model are made within a model space in which the nucleons are limited to a few orbits, when effective operators are used, taking into account the effect of the larger model space. This model offers a significant description of this issue [4]. Thus, the study of nuclei in the sd shell leads to a better understanding among the macroscopic (collective) description and the microscopic description of the core (shell model)[5]. In the current work, we focus a specific attention on the calculation of energy levels and the probability of transition within the shell model for 18 Ne isotope which has configurations of (0d5/2,1s1/2,0d3/2).
历史:收到:2019年接受:10支枪，2019年可以在网上使用:24年12月，2019年的研究，外壳模型用于在sd壳中消耗能量和减少温室效应代码B(E2) 18年的异位应用18 Ne isotope contain 2个质子在壳内存在16个O核(0d5 2、1/2和0d3/2)。DOI: http://dx.dodisOXBASH代码Ne同位素能源水平B (E2)ـليوونلابيكرتلاتساردليوونلاةرشقلاجذومنأقيبط18 Neشتابسكوأدوكلامعتسابنسحفلخيلعدبعمكاحليدهءاٌزٍفلامسق,خاىثللحٍتزرلاحٍلح,كفوكلاحعماج:حٍحارفملاخاملكلالاــــخـــصلاـــحشاثسكوادوكزٍظو18 Ne,حقاطلاخاٌورسمًاةةةةةةةتزكلااةةةةةةةهروااحةةةةةةةٍلامرحاحلزرخملاًاةتزكلاةةطهلاًااةتزلاةهروااحةٍلامرحاوحقاطلاخاٌورسمباسحمذحسارذلايذهًفحةلزرخملB (E2)زاةٍظى18 NeدلوةكامعرةساتOXBASHجزةرهلاهمة小学ضامعرةساواعفلالاافرلاKUOSDزٍظونأثٍ18 Neةحةلهلاراةخهٍووذوزتىلايورحٌ16 O)جزةرهلاًةف0 d5/2、1s1/2 0d3/2)اةهروااحةٍلامرحاوحةقاطلاخاٌورةسممٍةقدةواك。B (E2)جزفورملاحٍلمعلامٍهلاعموهعملكرتقفرذ。KUFA——物理杂志》|卷。11、12月2号(2019)Hadeel H . k Abed,阿里哈桑两个原子核。壳牌模型是最成功的核模型之一[1]。核物理上的一个中心挑战是对核结构的精确影响和空间模型的选择，这些影响可能导致对核外壳系统和正确度的广泛观察[2]。核外壳模型是最强大的工具之一，可以对经验数据进行定量解读。这两个中心的内核，外壳的任何计算都是N-N相互作用和形成空间对于valence particles。在原理上，一个人可以实现外壳模型的现实与相互作用的空间或有效的相互作用限制空间[3]。外壳模型的计算结果是在核限制很少使用的空间中进行的，当有效操作被使用时，对大质量空间的影响进行了记录。这个模型对这个问题有很大的解释[4]。因此，在sd的核心研究导致更好地理解macroscopic和微scopic对核心的描述[5]。在目前的工作中，我们特别关注能量水平的计算和外壳模型18 Ne同位素的转换的可能性，这些变量有其相似性(0d5/2,1s1/2,0d3 - 2)。
{"title":"Applying Nuclear Shell Model to Study Nuclear Structure for 18Ne by Using OXBASH Code","authors":"Hadeel H. Abed, A. K. Hasan","doi":"10.31257/2018/jkp/2019/110201","DOIUrl":"https://doi.org/10.31257/2018/jkp/2019/110201","url":null,"abstract":"Article history: Received: 20 MAR., 2019 Accepted: 10 GUN, 2019 Available Online: 24 DEC, 2019 In this study, the shell model used to calculate energy levels and reduced electric quadruple transition probability B(E2) for 18 Ne isotope using OXBASH code within the sd shell and using the KUOSD effective interaction. 18 Ne isotope contain two proton outside 16 O core in shell (0d5/2, 1s1/2, and 0d3/2) .The results of the energy levels and values of B(E2) were reasonably consistent with the experimental data available. DOI: http://dx.doi.org/10.31257/2018/JKP/2019/110201 K e y w o r d s : OXBASH Code Ne isotope Energy Levels B(E2) ـل يوونلا بيكرتلا تساردل يوونلا ةرشقلا جذومنأ قيبطت 18 Ne شابسكوأ دوك لامعتساب نسح فلخ يلع دبع مكاح ليده ءاٌزٍفلا مسق ,خاىثلل حٍتزرلا حٍلك , حفوكلا حعماج :حٍحارفملا خاملكلا لا ــــ خ ـــ صلا ـــ ح شاثسكوا دوك زٍظو 18 Ne , حقاطلا خاٌورسم ً اةةةةةةةتز كلا اةةةةةةةهرواا حةةةةةةةٍلامرحا حلزرخملا ً اةتز كلا ةةطهلا ًااةتزل اةهرواا حةٍلامرحاو حقاطلا خاٌورسم باسح مذ حسارذلا يذه ًف حةلزرخملا B(E2) زةٍظىل 18 Ne دوةك امعرةسات OXBASH جزةرهلا همةض sd امعرةساو اعفلا لاافرلا KUOSD زٍظو نأ ثٍح 18 Ne ةةلهلا راةخ هٍووذوزت ىلا يورحٌ 16 O ) جزةرهلا ًةف 0 d5/2, 1s1/2, and 0d3/2 ) اةهرواا حةٍلامرحاو حةقاطلا خاٌورةسم مٍةق دةواك . B(E2) جزفورملا حٍلمعلا مٍهلا عم وهعم لكرت قفرذ . JOURNAL OF KUFA–PHYSICS | Vol. 11, No. 2 December (2019) Hadeel H. Abed, Ali k. Hasan 2 nucleus. Shell model is one of the most prominent and successful nuclear models[1]. One of the central challenges in nuclear physics understanding on the nuclear structure is choosing the correct effective interaction and model space that can lead to predicting a wide range of observation from the nuclear shell model systematically and correctly[2]. The nuclear shell model is one of the most powerful tools to give a quantitative interpretation of the empirical data. The two central ingredients of any calculation of the shell model are the N-N interaction and configuration space for valence particles. In principle, one can implement calculations of shell models with realistic N-N interaction in an indefinite configuration space or with effective renormalized interaction restricted configuration space[3]. The calculations of the shell model are made within a model space in which the nucleons are limited to a few orbits, when effective operators are used, taking into account the effect of the larger model space. This model offers a significant description of this issue [4]. Thus, the study of nuclei in the sd shell leads to a better understanding among the macroscopic (collective) description and the microscopic description of the core (shell model)[5]. In the current work, we focus a specific attention on the calculation of energy levels and the probability of transition within the shell model for 18 Ne isotope which has configurations of (0d5/2,1s1/2,0d3/2).","PeriodicalId":16215,"journal":{"name":"Journal of Kufa - Physics","volume":"105 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2019-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80647936","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 : 2019-12-10DOI: 10.31257/2018/jkp/2019/110203
A. H. Alkhayatt, Ali Al-Azzawi, Zahraa Alakayashi
Polymer blends of different concentrations for PVP-K30 and different additive weights of PEG8000 have been prepared as polymeric blends solutions. The rheological and optical properties of the blends samples have been investigated using Ostwald viscometer and Refractometer. The results showed that the density, shear, relative and specific viscosities are increases with the increasing of PVP concentration and additive weight of PEG. The optical constant values such as refractive index, reflectance, molar reflectance, coefficient of finesse and Brewster Angle are increase with the increasing of PVP concentration and additive weight of PEG while the critical angle has the revers behavior. DOI: http://dx.doi.org/10.31257/2018/JKP/2019/110203
{"title":"Rheological and optical characterization of Polyvinylpyrrolidone (PVP) - Polyethylene glycol (PEG) polymer blends","authors":"A. H. Alkhayatt, Ali Al-Azzawi, Zahraa Alakayashi","doi":"10.31257/2018/jkp/2019/110203","DOIUrl":"https://doi.org/10.31257/2018/jkp/2019/110203","url":null,"abstract":"Polymer blends of different concentrations for PVP-K30 and different additive weights of PEG8000 have been prepared as polymeric blends solutions. The rheological and optical properties of the blends samples have been investigated using Ostwald viscometer and Refractometer. The results showed that the density, shear, relative and specific viscosities are increases with the increasing of PVP concentration and additive weight of PEG. The optical constant values such as refractive index, reflectance, molar reflectance, coefficient of finesse and Brewster Angle are increase with the increasing of PVP concentration and additive weight of PEG while the critical angle has the revers behavior. DOI: http://dx.doi.org/10.31257/2018/JKP/2019/110203","PeriodicalId":16215,"journal":{"name":"Journal of Kufa - Physics","volume":"41 1","pages":"15-22"},"PeriodicalIF":0.0,"publicationDate":"2019-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78233492","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 : 2019-12-10DOI: 10.31257/2018/jkp/2019/110213
J. N. Jabir, S. M. Ameen, A. Al-khursan
This work studies the gain from plasmonic quantum dot (QD) nanolaser.
研究了等离子体量子点(QD)纳米激光器的增益。
{"title":"A Plasmonic quantum dot nanolaser: effect of “waveguide Fermi energy” on material gain","authors":"J. N. Jabir, S. M. Ameen, A. Al-khursan","doi":"10.31257/2018/jkp/2019/110213","DOIUrl":"https://doi.org/10.31257/2018/jkp/2019/110213","url":null,"abstract":"This work studies the gain from plasmonic quantum dot (QD) nanolaser.","PeriodicalId":16215,"journal":{"name":"Journal of Kufa - Physics","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85180714","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 : 2019-12-10DOI: 10.31257/2018/jkp/2019/110209
A. Ali
Article history: Received: 17 JUN, 2019 Accepted: 29 AUG, 2019 Available Online: 25 DEC, 2019 Using first-principles quantum transport simulations, this work examines changes in the total electronic currents within the plane of short ultrathin graphene nanoribbon with armchair edges (AGNR). A 5AGNR-M (M = 4,12,20 and 28 zigzag line) junction was simulated and its transmission were analyzed. The I-V curves under external bias exhibit remarkable semiconducting characteristics. It further demonstrates that the length of the junction also showed significant effects in the determination of the semiconducting nature. More importantly, a significant increasing by double in bias voltage threshold of I–V characteristics have been observed for the positively charged nanoribbon in the family of 5-AGNRs. DOI: http://dx.doi.org/10.31257/2018/JKP/2019/110209 K e y w o r d s : Electron transport ultrathin armchair graphene nanoribbone tight-binding approximation نيفاركنا نم قيض يونان طيرش للاخ تانورتكنلاأ لاقتنأ ةسارد
{"title":"A Electron transport study on ultrathin armchair graphene nanoribbone","authors":"A. Ali","doi":"10.31257/2018/jkp/2019/110209","DOIUrl":"https://doi.org/10.31257/2018/jkp/2019/110209","url":null,"abstract":"Article history: Received: 17 JUN, 2019 Accepted: 29 AUG, 2019 Available Online: 25 DEC, 2019 Using first-principles quantum transport simulations, this work examines changes in the total electronic currents within the plane of short ultrathin graphene nanoribbon with armchair edges (AGNR). A 5AGNR-M (M = 4,12,20 and 28 zigzag line) junction was simulated and its transmission were analyzed. The I-V curves under external bias exhibit remarkable semiconducting characteristics. It further demonstrates that the length of the junction also showed significant effects in the determination of the semiconducting nature. More importantly, a significant increasing by double in bias voltage threshold of I–V characteristics have been observed for the positively charged nanoribbon in the family of 5-AGNRs. DOI: http://dx.doi.org/10.31257/2018/JKP/2019/110209 K e y w o r d s : Electron transport ultrathin armchair graphene nanoribbone tight-binding approximation نيفاركنا نم قيض يونان طيرش للاخ تانورتكنلاأ لاقتنأ ةسارد","PeriodicalId":16215,"journal":{"name":"Journal of Kufa - Physics","volume":"9 1","pages":"62-72"},"PeriodicalIF":0.0,"publicationDate":"2019-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82103379","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 : 2019-12-10DOI: 10.31257/2018/jkp/2019/110207
Ali Muhson, S. Abbas
Article history: Received: 22 MAY, 2019 Accepted: 03 OCT, 2019 Available Online: 25 DEC, 2019 The carbon quantum dots (CQDs) were prepared by using an easy and economic one – pot method. The starting materials are the ascorbic acid as a carbon source and copper acetate as a catalyst to accelerate the reaction. The structural and optical properties of the CQDs are studied by UV-VIS spectrophotometer and photoluminescence (PL) measurements, transmission electron microscope (TEM), X-ray diffraction (XRD) and Fourier transform-infrared spectroscopy (FTIR). The excitation wavelength and the pH-dependent of PL properties was investigated also. The results show that the CQDs have strong absorption peak in the UV-region. The PL is the excitation wavelength dependent. The PL of CQDs decreases upon lowering the pH value of the solutions and the PL peaks shifted to the shorter wavelength. The average size of the CQDs is 4 nm from the TEM measurements. DOI: http://dx.doi.org/10.31257/2018/JKP/2019/110207 K e y w o r d s : Carbon quantum dot optical properties emission spectra تينوبركلا تيوكلا طاقنلا ثازيوهو ريضحت سابع رابج ديعس نسحه تيطع يلع ةرصبلا تعهاج ,مولعلا تيلك , ءايزيفلا نسق :تيحاخفًنا ثاًهكنا نا ــــ خ ـــ صلا ـــ ت
文章历史:收稿日期:2019年5月22日接收日期:2019年10月03日在线日期:2019年12月25日采用简单经济的一锅法制备了碳量子点(CQDs)。以抗坏血酸为碳源，醋酸铜为催化剂加速反应。采用紫外-可见分光光度计和光致发光(PL)测量、透射电子显微镜(TEM)、x射线衍射(XRD)和傅里叶变换红外光谱(FTIR)研究了CQDs的结构和光学性质。研究了激发波长和ph对PL性质的影响。结果表明，CQDs在紫外区有较强的吸收峰。PL与激发波长有关。CQDs的发光峰随溶液pH值的降低而减小，发光峰向较短波长偏移。从TEM测量结果来看，CQDs的平均尺寸为4nm。DOI: http://dx.doi.org/10.31257/2018/JKP/2019/110207 K e y w o r d s:碳量子点的光学性质发射光谱تينوبركلاتيوكلاطاقنلاثازيوهوريضحتسابعرابجديعسنسحهتيطعيلعةرصبلاتعهاج,مولعلاتيلك,ءايزيفلانسق:تيحاخفًناثاًهكناناــــخـــصلاـــت
{"title":"Preparation and Characterization of the Carbon Quantum Dots","authors":"Ali Muhson, S. Abbas","doi":"10.31257/2018/jkp/2019/110207","DOIUrl":"https://doi.org/10.31257/2018/jkp/2019/110207","url":null,"abstract":"Article history: Received: 22 MAY, 2019 Accepted: 03 OCT, 2019 Available Online: 25 DEC, 2019 The carbon quantum dots (CQDs) were prepared by using an easy and economic one – pot method. The starting materials are the ascorbic acid as a carbon source and copper acetate as a catalyst to accelerate the reaction. The structural and optical properties of the CQDs are studied by UV-VIS spectrophotometer and photoluminescence (PL) measurements, transmission electron microscope (TEM), X-ray diffraction (XRD) and Fourier transform-infrared spectroscopy (FTIR). The excitation wavelength and the pH-dependent of PL properties was investigated also. The results show that the CQDs have strong absorption peak in the UV-region. The PL is the excitation wavelength dependent. The PL of CQDs decreases upon lowering the pH value of the solutions and the PL peaks shifted to the shorter wavelength. The average size of the CQDs is 4 nm from the TEM measurements. DOI: http://dx.doi.org/10.31257/2018/JKP/2019/110207 K e y w o r d s : Carbon quantum dot optical properties emission spectra تينوبركلا تيوكلا طاقنلا ثازيوهو ريضحت سابع رابج ديعس نسحه تيطع يلع ةرصبلا تعهاج ,مولعلا تيلك , ءايزيفلا نسق :تيحاخفًنا ثاًهكنا نا ــــ خ ـــ صلا ـــ ت","PeriodicalId":16215,"journal":{"name":"Journal of Kufa - Physics","volume":"26 1","pages":"45-51"},"PeriodicalIF":0.0,"publicationDate":"2019-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77220707","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：