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Investigating surface recombination velocity and bulk carrier lifetime in lithium tantalate using micro-photoconductance decay techniques
IF 2.8 3区 化学
Chemical Physics Letters Pub Date : 2025-03-24 DOI: 10.1016/j.cplett.2025.142061
Ntumba Lobo, Liu Huan Xiu, Endong Zhang, Masashi Kato
{"title":"Investigating surface recombination velocity and bulk carrier lifetime in lithium tantalate using micro-photoconductance decay techniques","authors":"Ntumba Lobo,&nbsp;Liu Huan Xiu,&nbsp;Endong Zhang,&nbsp;Masashi Kato","doi":"10.1016/j.cplett.2025.142061","DOIUrl":"10.1016/j.cplett.2025.142061","url":null,"abstract":"<div><div>Surface recombination velocity and bulk carrier lifetime in lithium tantalate were investigated using micro-photoconductance decay techniques. Polished and unpolished surfaces exhibited surface recombination velocities of 2.5 × 10<sup>4</sup> cm/s and 3.5 × 10<sup>4</sup> cm/s, respectively, with bulk carrier lifetimes ranging from 27 to 50 ns. X-ray photoelectron spectroscopy revealed that polishing reduces oxygen vacancies, decreasing surface recombination. Under 266 nm excitation, surface recombination dominated, whereas 355 nm excitation emphasized bulk recombination. Numerical modeling confirmed experimental trends. These findings enhance understanding of lithium tantalate for optoelectronic applications, enabling improved performance through control of surface and bulk recombination dynamics.</div></div>","PeriodicalId":273,"journal":{"name":"Chemical Physics Letters","volume":"869 ","pages":"Article 142061"},"PeriodicalIF":2.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143724293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Facile synthesis of MOFs derived TiO2/ZnO porous composite materials for enhanced ammonia sensing properties at room temperature
IF 2.8 3区 化学
Chemical Physics Letters Pub Date : 2025-03-24 DOI: 10.1016/j.cplett.2025.142059
E. Namratha , M.S. Surendra Babu , A. Jagan Mohan Reddy
{"title":"Facile synthesis of MOFs derived TiO2/ZnO porous composite materials for enhanced ammonia sensing properties at room temperature","authors":"E. Namratha ,&nbsp;M.S. Surendra Babu ,&nbsp;A. Jagan Mohan Reddy","doi":"10.1016/j.cplett.2025.142059","DOIUrl":"10.1016/j.cplett.2025.142059","url":null,"abstract":"<div><div>This paper discusses the facile synthesis of TiO<sub>2</sub>/ZnO composite materials derived from the corresponding metal-organic frameworks (MOFs) and chemiresistive ammonia gas sensing at room temperature. All MOF composites were characterized by Fourier transform Infrared (FT-IR) spectroscopy, X-ray diffraction and scanning electron microscope, XPS analysis and BET analysis. The unique composition, homogeneous distribution and crystalline microstructure of TiO<sub>2</sub>/ZnO composites exhibited enhanced surface reactivity and selectivity in ammonia gas sensing. c-MIL-125_50% Zn composite offered superior sensor performance and high selectivity towards ammonia gas with excellent stability, including high response value (268), quick response/recovery time (60/8 Sec) and outstanding stability. All sensing measurements were carried out at room temperature over NH<sub>3</sub> and various volatile organic compound (VOC) gases. The average particle size of all synthesized MOFs was around 30 nm.</div></div>","PeriodicalId":273,"journal":{"name":"Chemical Physics Letters","volume":"869 ","pages":"Article 142059"},"PeriodicalIF":2.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143735157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A two-dimensional montmorillonite membrane with carbon nanotube for fast and efficient separation of Li+ and Mg2+
IF 2.8 3区 化学
Chemical Physics Letters Pub Date : 2025-03-24 DOI: 10.1016/j.cplett.2025.142063
Licai Chen , Yunliang Zhao , Shutong Wang , Wenbo Wang , Lingjie Zhang , Tong Wen , Zhenlei Wang , Shuai Cheng , Yuhan Song , Tingting Zhang
{"title":"A two-dimensional montmorillonite membrane with carbon nanotube for fast and efficient separation of Li+ and Mg2+","authors":"Licai Chen ,&nbsp;Yunliang Zhao ,&nbsp;Shutong Wang ,&nbsp;Wenbo Wang ,&nbsp;Lingjie Zhang ,&nbsp;Tong Wen ,&nbsp;Zhenlei Wang ,&nbsp;Shuai Cheng ,&nbsp;Yuhan Song ,&nbsp;Tingting Zhang","doi":"10.1016/j.cplett.2025.142063","DOIUrl":"10.1016/j.cplett.2025.142063","url":null,"abstract":"<div><div>A membrane for fast and efficient separation of Li<sup>+</sup> and Mg<sup>2+</sup> was successfully prepared by constructing a thin montmorillonite nanosheets (MMTNS) interlayer with carbon nanotubes (CNTs) onto PES substrate. The introduction of MMTNS interlayer decreased the thickness of polyamide layer formed between polyethyleneimine and trimesoyl chloride as well as improved the hydrophilicity of membrane. CNTs expanded the interlayer spacing of MMTNS interlayer and shortened the length of water channels. The optimal CNTs/MMTNS/PA membrane demonstrated high Li<sup>+</sup>/Mg<sup>2+</sup> separation performance with a selectivity of 20.71, and exhibited a permeability of 22.45 L m<sup>−2</sup> h<sup>−1</sup>, nearly double that of MMTNS/PA membrane.</div></div>","PeriodicalId":273,"journal":{"name":"Chemical Physics Letters","volume":"869 ","pages":"Article 142063"},"PeriodicalIF":2.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143714688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Preparation and characterization of a novel deacetylated chitin @perlite/hydroxyapatite composite for effective adsorption of uranyl ions from aqueous solution: Experimental and DFT modeling studies
IF 2.8 3区 化学
Chemical Physics Letters Pub Date : 2025-03-24 DOI: 10.1016/j.cplett.2025.142062
Rachid El Kaim Billah , Selçuk Şimşek , Hicham Majdoubi , Yağmur Bütün , Savaş Kaya , Eduardo Alberto Lopez-Maldonado , Konstantin P. Katin , Riadh Marzouki , Mounia Achak
{"title":"Preparation and characterization of a novel deacetylated chitin @perlite/hydroxyapatite composite for effective adsorption of uranyl ions from aqueous solution: Experimental and DFT modeling studies","authors":"Rachid El Kaim Billah ,&nbsp;Selçuk Şimşek ,&nbsp;Hicham Majdoubi ,&nbsp;Yağmur Bütün ,&nbsp;Savaş Kaya ,&nbsp;Eduardo Alberto Lopez-Maldonado ,&nbsp;Konstantin P. Katin ,&nbsp;Riadh Marzouki ,&nbsp;Mounia Achak","doi":"10.1016/j.cplett.2025.142062","DOIUrl":"10.1016/j.cplett.2025.142062","url":null,"abstract":"<div><div>In this study, a novel ternary composite was synthesized and characterized for removal of uranyl from solutions. Comprehensive structural characterization was performed using various analyses to elucidate the properties of the composite. The adsorption of uranyl ions was evaluated by varying key parameters such as initial concentration, temperature, pH, contact time, and adsorbent dosage. The maximum adsorption capacity was determined to be 0.365 mol kg<sup>−1</sup>. Kinetic modeling revealed that the adsorption followed both intraparticle diffusion and Elovich models. Thermodynamic analysis confirmed that adsorption process was spontaneous and endothermic. DFT simulations were employed to gain molecular-level insights into the adsorption mechanism.</div></div>","PeriodicalId":273,"journal":{"name":"Chemical Physics Letters","volume":"869 ","pages":"Article 142062"},"PeriodicalIF":2.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143714689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
To bond or not to bond – What if the temperature is the question?
IF 2.8 3区 化学
Chemical Physics Letters Pub Date : 2025-03-23 DOI: 10.1016/j.cplett.2025.142052
Sofia Zaman , Andras Bodi , Paul M. Mayer
{"title":"To bond or not to bond – What if the temperature is the question?","authors":"Sofia Zaman ,&nbsp;Andras Bodi ,&nbsp;Paul M. Mayer","doi":"10.1016/j.cplett.2025.142052","DOIUrl":"10.1016/j.cplett.2025.142052","url":null,"abstract":"<div><div>Bond formation in 1,8-dimethylenenaphthalene neutrals and cations (C<sub>12</sub>H<sub>10</sub><sup>(+•)</sup>, 154 amu) was probed with mass spectrometry, pyrolysis/photoelectron photoion coincidence spectroscopy (py-PEPICO) and theory. The mass-analyzed ion kinetic energy (MIKE) spectra and neutralization–reionization (NR) mass spectra obtained for <em>m</em>/<em>z</em> 154 from directly ionized acenaphthene (<strong>1</strong>) and dissociatively ionized 1,8-bis(bromomethyl) naphthalene (C<sub>12</sub>H<sub>10</sub>Br<sub>2</sub>, 1,8-BM) were distinguishable. Combined with theory, the results were interpreted as the two sources forming <strong>1</strong><sup><strong>+•</strong></sup> ions with different average internal energy contents. Pyrolytic debromination of 1,8-BM was found to produce both acenaphthene <strong>1</strong> and acenaphthylene.</div></div>","PeriodicalId":273,"journal":{"name":"Chemical Physics Letters","volume":"868 ","pages":"Article 142052"},"PeriodicalIF":2.8,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Carbon quantum dots-modified TiO2 nanoparticles for antibacterial applications
IF 2.8 3区 化学
Chemical Physics Letters Pub Date : 2025-03-23 DOI: 10.1016/j.cplett.2025.142055
Honghui Guo , Jie Zhang , Jian Gao , Ziyu Liang , Wei Li , Hong Yan , Ruijie Guo , Huifang Wang
{"title":"Carbon quantum dots-modified TiO2 nanoparticles for antibacterial applications","authors":"Honghui Guo ,&nbsp;Jie Zhang ,&nbsp;Jian Gao ,&nbsp;Ziyu Liang ,&nbsp;Wei Li ,&nbsp;Hong Yan ,&nbsp;Ruijie Guo ,&nbsp;Huifang Wang","doi":"10.1016/j.cplett.2025.142055","DOIUrl":"10.1016/j.cplett.2025.142055","url":null,"abstract":"<div><div>Carbon quantum dots (CQDs) were prepared by top-down hydrothermal method by corn stalks as a carbon source. The CQDs were composited with titanium dioxide (TiO<sub>2</sub>) to improve its antibacterial properties under visible light. The prepared nanocomposites were characterized by UV–Vis, EA, PL, TEM, XRD, FT-IR and XPS. PL analysis showed that the prepared CQDs had good upconversion fluorescence properties. FTIR and XPS demonstrated that the CQDs were successfully loaded onto the surface of TiO<sub>2</sub>, which were connected by C-O-Ti bonds. Finally, the effect of CQDs on the photocatalytic and antimicrobial properties of TiO<sub>2</sub> was evaluated.</div></div>","PeriodicalId":273,"journal":{"name":"Chemical Physics Letters","volume":"869 ","pages":"Article 142055"},"PeriodicalIF":2.8,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143696905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Exploring the role of vacancy defects in the spin and thermoelectric properties of 2H-ZSiCNR-1H nanoribbons
IF 2.8 3区 化学
Chemical Physics Letters Pub Date : 2025-03-22 DOI: 10.1016/j.cplett.2025.142045
Somaye Esteki, Rouhollah Farghadan
{"title":"Exploring the role of vacancy defects in the spin and thermoelectric properties of 2H-ZSiCNR-1H nanoribbons","authors":"Somaye Esteki,&nbsp;Rouhollah Farghadan","doi":"10.1016/j.cplett.2025.142045","DOIUrl":"10.1016/j.cplett.2025.142045","url":null,"abstract":"<div><div>This paper presents a comprehensive investigation into the effects of spin transport, thermal conductivity, and the Seebeck coefficient in the ferromagnetic phase of asymmetrically hydrogenated zigzag silicon carbide nanoribbons (2H-ZSiCNR-1H) with vacancy defects. Using density functional theory combined with the Landauer–Büttiker formalism, we explore how vacancy defects – ranging from the edge to the center of the nanoribbon – affect the spin-semiconducting and thermoelectric behaviors. While the spin-conserved gap and band structure for spin-up and spin-down electrons and holes exhibit significant differences, this asymmetry in the band structures and, ultimately, the transmission coefficient facilitates the generation of distinct thermal currents and spin-Seebeck coefficients (SSC) in these asymmetrically hydrogenated nanostructures. Furthermore, the presence and spatial arrangement of vacancy defects within the nanoribbon significantly impact the band structure, resulting in variations in spin current values, threshold temperatures, and SSC. In certain configurations, these defects can even induce negative differential thermoelectric resistance. Notably, the maximum SSC for defected structures reaches 1.6 mV/K for spin-up electrons, underscoring the potential of defect engineering in optimizing the thermoelectric and spintronic properties of 2H-ZSiCNR-1H nanoribbons for advanced applications.</div></div>","PeriodicalId":273,"journal":{"name":"Chemical Physics Letters","volume":"869 ","pages":"Article 142045"},"PeriodicalIF":2.8,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Attosecond control of molecular tunneling ionization by asymmetric, phase-controlled, two-color laser fields: Molecular control at room temperature
IF 2.8 3区 化学
Chemical Physics Letters Pub Date : 2025-03-22 DOI: 10.1016/j.cplett.2025.142049
Hideki Ohmura
{"title":"Attosecond control of molecular tunneling ionization by asymmetric, phase-controlled, two-color laser fields: Molecular control at room temperature","authors":"Hideki Ohmura","doi":"10.1016/j.cplett.2025.142049","DOIUrl":"10.1016/j.cplett.2025.142049","url":null,"abstract":"<div><div>Attosecond molecular control without using attosecond light pulses made it possible to avoid the loss of information and disturbances due to random thermal motions of molecules at room temperature. I examined the orientation-selective molecular tunneling ionization induced at room temperature by linearly polarized, femtosecond, phase-controlled laser fields consisting of a fundamental and a second harmonic light with a pulse duration of 130 fs and an intensity of 5 × 10<sup>13</sup> W/cm<sup>2</sup>. I confirmed that orientation-selective molecular tunneling ionization occurred even at room temperature and pressures up to 1.5 Pa. Such molecular control at room temperature not only removed the limitation on the laser repetition rate to enable highly sensitive measurements, but it also enabled a significant reduction in the size of the instrument.</div></div>","PeriodicalId":273,"journal":{"name":"Chemical Physics Letters","volume":"869 ","pages":"Article 142049"},"PeriodicalIF":2.8,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143792345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microwave spectrum and molecular structure calculations for a butadiene iron tricarbonyl–water complex
IF 2.8 3区 化学
Chemical Physics Letters Pub Date : 2025-03-22 DOI: 10.1016/j.cplett.2025.142046
Rhett P. Hill, Andrew J. Dull, Myla G. Gonzalez, Lily I. Jensen, Adam M. Daly, Stephen G. Kukolich
{"title":"Microwave spectrum and molecular structure calculations for a butadiene iron tricarbonyl–water complex","authors":"Rhett P. Hill,&nbsp;Andrew J. Dull,&nbsp;Myla G. Gonzalez,&nbsp;Lily I. Jensen,&nbsp;Adam M. Daly,&nbsp;Stephen G. Kukolich","doi":"10.1016/j.cplett.2025.142046","DOIUrl":"10.1016/j.cplett.2025.142046","url":null,"abstract":"<div><div>The gas phase microwave spectra for a dimer between water and an organometallic complex were measured using a pulsed-beam Fourier transform microwave spectrometer. 32 rotational transitions for the weakly bound complex of butadiene iron tricarbonyl and water were measured in the region of 6–14 GHz and fit to determine rotational constants of A = 973.9279(9) MHz, B = 606.1943 (4) MHz, C = 605.2675 (4) MHz. Structure A, calculated using B3LYP/aug-cc-pVTZ Empirical Dispersion = GD3, provides v = 0 rotational constants in excellent agreement with measured values. There appear to be 3 hydrogen bonds stabilizing the dimer.</div></div>","PeriodicalId":273,"journal":{"name":"Chemical Physics Letters","volume":"869 ","pages":"Article 142046"},"PeriodicalIF":2.8,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143724291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
DFT study of small gas molecules (C2H2, CH4, CO and H2) adsorbed on Au, Ag-doped ZnO monolayer
IF 2.8 3区 化学
Chemical Physics Letters Pub Date : 2025-03-21 DOI: 10.1016/j.cplett.2025.142043
Qing An , Juan Li , Jian Peng , Lan Hu
{"title":"DFT study of small gas molecules (C2H2, CH4, CO and H2) adsorbed on Au, Ag-doped ZnO monolayer","authors":"Qing An ,&nbsp;Juan Li ,&nbsp;Jian Peng ,&nbsp;Lan Hu","doi":"10.1016/j.cplett.2025.142043","DOIUrl":"10.1016/j.cplett.2025.142043","url":null,"abstract":"<div><div>In this paper, the interactions of small gas molecules (C<sub>2</sub>H<sub>2</sub>, CH<sub>4</sub>, CO and H<sub>2</sub>) with pure ZnO, Ag-ZnO and Au-ZnO monolayer were investigated using DFT calculations to explore their potential applications as gas sensing. Among them, the adsorption effect on C<sub>2</sub>H<sub>2</sub> and CH<sub>4</sub> was better with an increase of 1 eV in adsorption energy, and the adsorption effect of other gases was improved (CO: −0.63 eV to −1.03 eV, H<sub>2</sub>: −0.68 to −1.44 eV). The increase in adsorption energy was explained by parameters such as charge transfer, density of states and work function. Meanwhile, intrinsic ZnO is unsuitable for gas detection and adsorption, while the Au-ZnO monolayer suits C<sub>2</sub>H<sub>2</sub>, CH<sub>4</sub>, CO and H<sub>2</sub> detection. The electrical conductivity of the adsorption models is changed to varying degrees after gas adsorption. The research results act as a theoretical foundation for constructing gas sensors with a ZnO-based material.</div></div>","PeriodicalId":273,"journal":{"name":"Chemical Physics Letters","volume":"869 ","pages":"Article 142043"},"PeriodicalIF":2.8,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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