Materials Research Bulletin最新文献

{"title":"Efficient multi-functional erbium-doped lithium yttrium fluoride phosphor synthesized by novel microwave-assisted combustion technique for diverse applications","authors":"M. Siva Kumar ,&nbsp;Sushree Bedamati ,&nbsp;Mitrabhanu Behera ,&nbsp;R. Arun Kumar ,&nbsp;M. Ramudu ,&nbsp;Kaushal Kumar ,&nbsp;Przemyslaw Wozny ,&nbsp;Kevin Soler-Carracedo ,&nbsp;Marcin Runowski","doi":"10.1016/j.materresbull.2025.113484","DOIUrl":"10.1016/j.materresbull.2025.113484","url":null,"abstract":"<div><div>It is aimed at investigating the structural and optical properties of LiYF₄: Er phosphor material to realize its ability in multi-functional applications. Samples were prepared by the microwave-assisted combustion route that is the most feasible technique to prepare the bulk amount of samples in a short time. The LiYF₄ sample possessed the lower maximum phonon energy of 563 cm⁻¹ that favors luminescence. Based on the upconversion emission under different concentrations, pump powers, and temperatures, it is ensured that the prepared phosphor has multi-functional capability. It can be used to improve the solar cell performance, to detect the invisible IR radiation, and to measure the temperature through optical thermometry where conventional methods cannot be performed. We have developed a device based on resin-coated LiYF₄: Er phosphor film to detect the harmful and invisible near infrared (NIR) radiation. The device has significantly produced visible emission when it is irradiated with NIR laser beam. Three types of modes have been applied in four ways to determine the sensitivity of the phosphor system, i.e., (1) fluorescence intensity (FI), (2) fluorescence intensity ratio (FIR) of (i) thermally coupled (TCL) and (ii) non-thermally coupled energy levels (NTCL), and through (3) CIE chromaticity coordinates. The maximum relative sensitivity (S_r) of 1.47 %<em>K</em>⁻¹ is achieved by FI_{551 nm} mode at 320 K, it has maintained the above 1 %<em>K</em>⁻¹ till 440 K and the least value it has delivered is 0.79 %<em>K</em>⁻¹ at 520 K. The CIE coordinates mode exhibited the appreciable relative sensitivity of 0.21 %<em>K</em>⁻¹ at 540 K in this mode. The most benefit thing in this mode is that the relative sensitivity improves with temperature since it exhibited stable absolute sensitivity of 0.08 × 10⁻² K⁻¹ in the range of 300–540 K.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"190 ","pages":"Article 113484"},"PeriodicalIF":5.3,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143850755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydrothermally synthesized NiSe2 nanospheres for efficient bifunctional electrocatalysis in alkaline seawater electrolysis: High performance and stability in HER and OER","authors":"Shuang-shuang Zhang ,&nbsp;Rui-Yu Li ,&nbsp;Xin Li ,&nbsp;Yong-qi Tian ,&nbsp;Rong-da Zhao ,&nbsp;Jun Xiang ,&nbsp;Fu-fa Wu ,&nbsp;De-peng Zhao","doi":"10.1016/j.materresbull.2025.113463","DOIUrl":"10.1016/j.materresbull.2025.113463","url":null,"abstract":"<div><div>Finding active and stable electrocatalysts composed of inexpensive elements, with simple synthesis methods, high catalytic performance, and excellent cycling stability is crucial for hydrogen production through water electrolysis. In this study, NiSe₂ nanospheres were grown on nickel-cobalt precursor foam nickel using a hydrothermal method. At a current density of 10 mA cm^-2, the overpotential for the hydrogen evolution reaction (HER) was 149.7 mV, while the overpotential for the oxygen evolution reaction (OER) was 198 mV. The electrocatalyst maintained its morphology almost intact even after 12 h of stability testing, and its performance remained stable after cyclic testing. Furthermore, in an alkaline seawater electrolysis environment at a current density of 10 mA cm^-2, the overpotential for HER was 154.5 mV, and the overpotential for OER was 182.5 mV.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"189 ","pages":"Article 113463"},"PeriodicalIF":5.3,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143815424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploration of structural and optoelectronic behaviour of mechanochemically synthesized earth-abundant phase pure Cu2FeSnSe4","authors":"Immanuel A․ ,&nbsp;Angel Agnes J․ ,&nbsp;Devika Rajan Sajitha ,&nbsp;Kamalan Kirubaharan A․M․ ,&nbsp;Chandramohan Govindasamy ,&nbsp;Khalid M. Almutairi ,&nbsp;Beauno S․ ,&nbsp;Shyju Thankaraj Salammal","doi":"10.1016/j.materresbull.2025.113477","DOIUrl":"10.1016/j.materresbull.2025.113477","url":null,"abstract":"<div><div>A solvent-free mechanochemical method has been employed to synthesize the eco-friendly photo absorber Cu₂FeSnSe₄ (CFTSe) semiconductor using earth-abundant materials. A single-phase quaternary chalcogenide CFTSe was achieved during continuous milling, confirmed by powder X-ray diffraction along with Rietveld refinement and Raman analysis. The material, crystallized in a tetragonal structure (<em>a</em> = <em>b</em> = 5.68, <em>c</em> = 11.35 Å), was verified through sharp diffraction peaks and high-resolution transmission electron microscopy, which indicated (112) orientation with <em>d</em> = 3.2 Å. FESEM and EDS showed particles close to uniform size and stoichiometric composition. Optical properties were analyzed via UV–Vis spectroscopy, revealing an absorption coefficient of ∼10⁴ cm^-1 and a band gap of 1.1 eV. XPS analysis identified various valence states, while Hall measurements confirmed the p-type nature with a carrier concentration of 3.29 × 10¹⁹ cm^-3 and a mobility of 16.8 cm² V^-1 s^-1. The material demonstrated thermal stability up to 520 °C, making it suitable for photovoltaic and semiconductor applications.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"189 ","pages":"Article 113477"},"PeriodicalIF":5.3,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143822376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Oxygen vacancies boosted piezo-catalytic activity of (Ba0.9Ca0.1)(Ti0.85Zr0.15)O3 ceramics","authors":"Xinyu Deng ,&nbsp;Jiaxin Ye ,&nbsp;Daen Zhao ,&nbsp;Luoping Yang ,&nbsp;Guifen Fan ,&nbsp;Qiaoji Zheng ,&nbsp;Dunmin Lin","doi":"10.1016/j.materresbull.2025.113481","DOIUrl":"10.1016/j.materresbull.2025.113481","url":null,"abstract":"<div><div>As a cost-effective, simple and feasible strategy for wastewater treatment, piezoelectric catalysis stands out for its unique energy conversion mechanism in recent years. Herein, oxygen vacancies have been induced in (Ba_0.9Ca_0.1)(Ti_0.85Zr_0.15)O₃ (BCZT) by a high-temperature annealing strategy to improve the piezoelectric catalytic performance of BaTiO₃-based lead-free ceramics. The annealed BCZT ceramic at 700 °C possesses a moderate concentration of oxygen vacancies (53 % O_V content), which can function as electron donors, significantly enhancing carrier mobility and providing electron-rich sites for adsorption and activation of O₂. Consequently, the BCZT ceramic annealed at 700 °C exhibits significant enhancement in the piezoelectric catalytic performance, with the degradation rate of Rhodamine B (RhB) reaching 95.3 % in 90 min, and a reaction rate constant <em>k</em> of 0.03303 min^-1. This study offers a valuable approach to improve the catalytic proficiency of piezoelectric materials by modulating oxygen vacancy content in perovskite piezoelectric materials.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"189 ","pages":"Article 113481"},"PeriodicalIF":5.3,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143815423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication of asymmetric supercapacitor device using Mn-doped NiCo2O4 with improved electrochemical performance","authors":"Manpreet Kaur ,&nbsp;Prakash Chand ,&nbsp;Hardeep Anand ,&nbsp;Vikas Yadav","doi":"10.1016/j.materresbull.2025.113473","DOIUrl":"10.1016/j.materresbull.2025.113473","url":null,"abstract":"<div><div>NiCo₂O₄ is prepared through a facile co-precipitation method followed by calcination without any surfactant with variable amounts of Mn-doping viz. 0 %, 5 %, 10 % and 15 %. The as-prepared samples are named MNC0, MNC5, MNC10,and MNC15 according to the amount of Mn-dopant. Each produced sample exposed a different morphology with the expectation of different electrochemical behavior, which was confirmed through various electrochemical techniques in a three-electrode set-up. The materials with Mn-doping exhibit a notable specific capacity, prolonged discharge times, and minimal charge transfer resistance compared to MNC0. Specifically, at 2.0 Ag^-1, the obtained specific capacity quantities for MNC0, MNC5, MNC10 and MNC15 are 354.0, 726.04, 1070.4 and 981.5 Cg^-1. The Mn-doped NiCo₂O₄//AC (activated carbon) asymmetric supercapacitor device, when assembled, demonstrates impressive powerdensity and energy density of 370.37 W kg^-1and 20.58 Wh kg^-1 at 2.00 A g^-1 respectively, along with retention cycling stability of 81 % and coulombic efficiency of 94 – 98 % after 4000 cycles. The realistic demonstration of powering yellow and green LEDs highlights the practical application of fabricated energy storage devices. This work explores a range of Mn concentrations and their impact on the electrochemical performance of the materials. This study demonstrated significant improvements in capacitance, cycling stability, and charge transfer resistance compared to undoped NiCo₂O₄.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"189 ","pages":"Article 113473"},"PeriodicalIF":5.3,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143808666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Achieving mechanical-magnetic (FeCoNi)86Al4Cu3Ti7 HEAs","authors":"Qun Zou ,&nbsp;Bo Li ,&nbsp;Jia-Yi Yin ,&nbsp;Li-Long Zhu ,&nbsp;Ge-Mei Cai","doi":"10.1016/j.materresbull.2025.113476","DOIUrl":"10.1016/j.materresbull.2025.113476","url":null,"abstract":"<div><div>The simultaneous achievement of magnetic properties and mechanical strengthening in high entropy alloys (HEAs) is crucial for advanced applications but remains challenging. We present a CALPHAD-guided thermomechanical strategy to controllably precipitate L1₂ nanoparticles within FCC matrix, using (FeCoNi)₈₆Al₄Cu₃Ti₇ HEAs as a model system. Both recrystallization and aging specimens exhibit exceptional yield strengths (&gt;1 GPa) while retaining considerable ductility. The optimized microstructure demonstrates superior magnetic properties compared to the reported HEAs, offering a feasible strategy for developing superior magnetic structural materials through CALPHAD-directed phase engineering.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"189 ","pages":"Article 113476"},"PeriodicalIF":5.3,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143808669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigating the orientation dependence on functional properties in Bi0.5Na0.5TiO3-BaTiO3 films","authors":"Ilham Hamdi Alaoui ,&nbsp;Abdelilah Lahmar ,&nbsp;Oumayma Mlida ,&nbsp;Freddy Ponchel ,&nbsp;Antonio Da Costa ,&nbsp;Françoise Le Marrec ,&nbsp;Jamal Belhadi ,&nbsp;Alexandre Ysebaert ,&nbsp;Anna Cantaluppi ,&nbsp;Marie-Hélène Chambrier ,&nbsp;Rachel Desfeux ,&nbsp;Denis Remiens ,&nbsp;Anthony Ferri ,&nbsp;Nathalie Lemée","doi":"10.1016/j.materresbull.2025.113475","DOIUrl":"10.1016/j.materresbull.2025.113475","url":null,"abstract":"<div><div>The morphotropic phase boundary (MPB) composition in lead free (1-x) Bi_0.5Na_0.5TiO₃ – x BaTiO₃ (BNTBT) solid solution has attracted extensive research due to its significant potential for piezoelectric and high-power energy storage applications. Here, epitaxial (001) and (111) BNTBT films with composition around the MPB are investigated. A complex domain pattern is evidenced for both film orientation, due to the coexistence of a weak polar phase and a strong polar ferroelectric phase. An electric field induced phase switching is shown in both (001) and (111) oriented film, as well as a weakening of the polar state in the (111) BNTBT film. The enhanced ergodic relaxor state in the (111) BNTBT film gives rise to a reduced piezoelectric response and improved energy storage performances. The epitaxial symmetry engineering is shown to provide a complementary approach to the composition strategy to improve the functional properties in BNTBT films.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"189 ","pages":"Article 113475"},"PeriodicalIF":5.3,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143822374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Eco-friendly synthesis and multifunctional applications of Ba2ZnGe2O7:Bi3+ phosphors for advanced radiation dosimetry and high-performance w-LEDs","authors":"I.S. Pruthviraj ,&nbsp;B.R. Radha Krushna ,&nbsp;S.C. Sharma ,&nbsp;S.S. Mohapatra ,&nbsp;R. Jayanthi ,&nbsp;Vimala Ananthy ,&nbsp;K. Manjunatha ,&nbsp;Sheng Yun Wu ,&nbsp;H. Nagabhushana","doi":"10.1016/j.materresbull.2025.113474","DOIUrl":"10.1016/j.materresbull.2025.113474","url":null,"abstract":"<div><div>A series of Ba₂ZnGe₂O₇ (BZGO) phosphors, both undoped and doped with Bi³⁺ (1–11 mol %), were successfully synthesized via an eco-friendly solution combustion method using <em>Spinach</em> leaf extract (<em>S.E.</em>) as a natural fuel. The influence of varying Bi³⁺ concentrations on the thermoluminescence (TL) and photoluminescence (PL) properties was systematically examined to develop advanced dosimetric materials outperforming commercial alternatives. TL glow curve analysis of gamma (<em>γ</em>)-irradiated BZGO:Bi³⁺ phosphors revealed two prominent peaks, with the highest intensity observed for BZGO:7 %Bi³⁺. Further investigation of TL behavior across a wide <em>γ</em>-ray dose range (0.01–500 Gy) identified distinct glow peaks at approximately 153 °C and 243 °C. A linear increase in TL intensity over the range of 0.01–500 Gy demonstrates the materials exceptional potential for accurate dose measurements. Additionally, the Initial Rise (IR) method identified three distinct trap levels within the bandgap in the low-temperature region, further elucidating the material's trapping dynamics. Advanced glow curve deconvolution using the Computerized Glow Curve Deconvolution (CGCD) method revealed a multi-peak structure, offering detailed insights into the luminescent mechanisms. PL analysis showcased a strong excitation band spanning 250–500 nm, making these phosphors well-suited for ultra-violet light emitting diodes (UV-LED) excitation. Under 323 nm excitation, BZGO:Bi³⁺ phosphors exhibited an intense blue emission at 448 nm, attributed to the ^<em>3</em><em>P</em>_<em>1</em> <em>→</em> ^<em>1</em><em>S</em>_<em>0</em> transition of Bi³⁺ ions. The phosphors demonstrated an impressive internal quantum efficiency (<em>I_QE</em>) of 82.34 % and an activation energy (<em>E_a</em>) of 0.3844 eV, alongside remarkable thermal stability, retaining 88.20 % of their luminescence intensity at 420 K. To validate their practical utility, the phosphors were integrated into white light-emitting diodes (w-LEDs), achieving CIE chromaticity coordinates of (0.3376, 0.3239), a correlated color temperature (CCT) of 5360 K, and an excellent color rendering index (CRI) of 92. These results highlight the superior performance of BZGO:Bi³⁺ phosphors, positioning them as outstanding candidates for both precise dosimetry and energy-efficient lighting applications due to their exceptional efficiency, stability, and multifunctional capabilities.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"189 ","pages":"Article 113474"},"PeriodicalIF":5.3,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143830024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"One-step synthesis of trace Ni-coupled Cu/Cu2O nanoparticles enables high-efficiency ammonia synthesis and zinc-nitrate batteries","authors":"Ping Wang ,&nbsp;Xiaoxia He ,&nbsp;Moyu Liao ,&nbsp;Xin Zeng ,&nbsp;Qiling Duan ,&nbsp;Zhongxu Dai","doi":"10.1016/j.materresbull.2025.113472","DOIUrl":"10.1016/j.materresbull.2025.113472","url":null,"abstract":"<div><div>Converting nitrate to ammonia offers an efficient means of degrading pollutants and producing valuable industrial products. This study strategically tuned the Ni content in precursors to directly elucidate the Ni-Cu synergy through Faradaic efficiency (FE) quantification. Cu6Ni1-BMC, synthesized via a one-step wet-chemical method at room temperature, delivered a maximum NH₃ yield rate of 39.7 mg cm⁻² h⁻¹ (9.93 mg mg_cat⁻¹ h⁻¹) at -1.0 V <em>vs.</em> RHE, with an FE of 95 %. The current density of NO₃⁻RR stabilized at 400 mA cm⁻² after 15 h of constant-potential reduction at -0.8 V <em>vs.</em> RHE. Concurrent enhancement of catalytic performance and reduction in oxidation state was observed during catalyst activation. In addition, the Zn-NO₃⁻ battery based on Cu6Ni1-BMC electrode exhibits a power density of 9.12 mW cm⁻² and a stable ability to maintain energy.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"189 ","pages":"Article 113472"},"PeriodicalIF":5.3,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143808667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Laser-induced graphitization (LIG) of a Mediterranean cultivation softwood: does anisotropy matter?","authors":"Alessio Mostaccio ,&nbsp;Francesco Bolognesi ,&nbsp;Valerio Appetito ,&nbsp;Joanna Filippi ,&nbsp;Leonardo Duranti ,&nbsp;Tilde De Caro ,&nbsp;Alessio Mezzi ,&nbsp;Francesca Romana Lamastra ,&nbsp;Daniela Caschera ,&nbsp;Giampiero Montesperelli ,&nbsp;Eugenio Martinelli ,&nbsp;Marco Togni ,&nbsp;Gaetano Marrocco ,&nbsp;Alessandra Bianco","doi":"10.1016/j.materresbull.2025.113460","DOIUrl":"10.1016/j.materresbull.2025.113460","url":null,"abstract":"<div><div>Laser-Induced Graphitization (LIG) is a cost-effective, scalable and versatile technique that allows the conversion of carbon-rich substrates into conductive carbonaceous layers, particularly promising in the field of printed electronics. Laser-Induced Graphitization of lignocellulosic materials (<em>green LIG</em>) represents an attractive choice for the development of sustainable zero-waste electronic and electrochemical devices. The focus of this study is on <em>Cedrus</em> sp. (cedar), a fast-growing cultivation softwood diffused in the Mediterranean area, mainly employed in arboriculture or processed in chips for biofuels. Cedar wood (dry density 0.47 g/cm³, longitudinal cut, minimum thickness 1 mm) was laser-scribed in room conditions using a conventional system. Laser power, defocusing and scribing direction have been systematically varied. Pristine and antiflame-treated wood substrates have been investigated. A comprehensive structural characterization was performed from the macro- to the nanoscale by optical microscopy, scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and Raman spectroscopy. The thermal degradation profiles were acquired by thermogravimetry and the electrical properties determined by four-point probe multimeter. Optimized LIG parameters (laser power 8 %, writing speed 1.75 %, minimum off-set 3 mm below the focal plane) led to the conversion of cedar wood into well-organized crack-free 3D carbonaceous layers characterized by a minimum sheet resistance of about 100 Ω/sq or 40 Ω/sq by single-run lasing, respectively, perpendicularly (cellulose-rich direction) or in parallel (lignin-rich direction) to the wood grain. LIG traces derived from wood pretreated with the antiflame showed comparable electrical performance (37 Ω/sq) if lased orthogonally to the wood grain (cellulose-rich direction), the Rs value increased by one order of magnitude (329 Ω/sq) lasing in parallel to the wood grain (lignin-rich direction). Therefore, this study revealed that the control of the laser-writing direction enables the optimization of the electrical performance of green LIG products derived from wood, also significantly contributing to the mitigate the variability of the results. The electrical properties of LIG traces derived from cedar wood in room conditions pave the way to the development of differential sensors, micro-fluidic devices and antennas for near-field communication.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"189 ","pages":"Article 113460"},"PeriodicalIF":5.3,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143808665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}