Journal of Science: Advanced Materials and Devices最新文献

{"title":"Adsorption of dimethylaluminum isopropoxide (DMAI) on the Al2O3 surface: A machine-learning potential study","authors":"Miso Kim,&nbsp;Sehee Kim,&nbsp;Bonggeun Shong","doi":"10.1016/j.jsamd.2024.100754","DOIUrl":"10.1016/j.jsamd.2024.100754","url":null,"abstract":"<div><p>Dimethylaluminum isopropoxide (DMAI) is attracting attention as an alternative precursor for atomic layer deposition (ALD) of aluminum oxide (Al₂O₃). However, the surface chemical reaction mechanisms of DMAI during ALD regarding its dimeric structure under vacuum deposition process conditions has yet to be clear. In this work, the adsorption mechanism of dimeric and monomeric DMAI on a fully hydroxylated Al₂O₃ surface is studied using machine-learning potential (MLP) calculations. The initial adsorption of DMAI appears facile and would result in the coexistence of both methyl and isopropoxy ligands on the surface. The reactivity of DMAI is smaller than that of TMA, owing to the propensity of DMAI to adopt a dimeric form. Especially when the substrate is partially covered by other adsorbate species, the large molecular size and low reactivity of dimeric DMAI considerably hinder its reactivity toward surface adsorption. Current results are in good correspondence with the previous experimental results, where lower growth per cycle (GPC) and higher selectivity in area-selective ALD (AS-ALD) could be observed by using DMAI than compared to those of TMA processes.</p></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"9 3","pages":"Article 100754"},"PeriodicalIF":8.0,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2468217924000856/pdfft?md5=9cbdef6a50b4b9595b5b7045893dbb76&pid=1-s2.0-S2468217924000856-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141276431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Giant magnetocaloric effect and hysteresis loss in MnxFe2-xP0.5Si0.5 (0.7 ≤ x ≤ 1.2) microwires at ambient temperatures","authors":"Lin Luo ,&nbsp;Hongxian Shen ,&nbsp;Lunyong Zhang ,&nbsp;Yongjiang Huang ,&nbsp;Jianfei Sun ,&nbsp;Manh-Huong Phan","doi":"10.1016/j.jsamd.2024.100756","DOIUrl":"https://doi.org/10.1016/j.jsamd.2024.100756","url":null,"abstract":"<div><p>Magnetocaloric microwires are very promising for energy-efficient magnetic refrigeration in micro electromechanical systems (MEMS) and nano electromechanical systems (NEMS). Creating microwires that exhibit large magnetocaloric effects around room temperature represents an important but challenging task. Here, we report a tunable giant magnetocaloric effect around room temperature in Mn_<em>x</em>Fe_2-<em>x</em>P_0.5Si_0.5 (0.7≤<em>x</em> ≤ 1.2) microwires by utilizing a melt-extraction technique paired with thermal treatment and chemical engineering. The isothermal magnetic entropy change (Δ<em>S</em>_iso) and Curie temperature (<em>T</em>_C) can be tuned by adjusting the Mn/Fe ratio. The <em>T</em>_C varies from 351 to 190 K as <em>x</em> increases from 0.8 to 1.2. Among the compositions investigated, the <em>x</em> = 0.9 sample shows the largest value of Δ<em>S</em>_iso = 18.3 J kg⁻¹ K⁻¹ for a field change of 5 T around 300 K. After subtracting magnetic hysteresis loss, a large refrigerant capacity of ∼284.6 J kg⁻¹ is achieved. Our study paves a new pathway for the design of novel magnetocaloric microwires for active magnetic refrigeration at ambient temperatures.</p></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"9 3","pages":"Article 100756"},"PeriodicalIF":6.7,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S246821792400087X/pdfft?md5=0b40fbf7b09e0267de44b2140750f617&pid=1-s2.0-S246821792400087X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141486007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of laser processability for LiFePO4 cathode material with nanosecond and femtosecond laser","authors":"Jaegeun Shin ,&nbsp;Juhee Yang ,&nbsp;Dongkyoung Lee","doi":"10.1016/j.jsamd.2024.100753","DOIUrl":"10.1016/j.jsamd.2024.100753","url":null,"abstract":"<div><p>Exploration of increased electrode surface area through laser structuring is undertaken to improve performance. While nanosecond lasers offer cost-effective processing, femtosecond lasers achieve a minimal heat effect, excelling in precision. Prior research has mainly focused on changes in electrode performance due to the duration of laser pulses, with insufficient attention to optimizing processability. This study, therefore, aims to compare the processability of active material coating layer in LFP cathodes using both nanosecond and femtosecond lasers. The specimens were subsequently analyzed morphologically for processability using scanning electron microscopy (SEM). Differences in the cross-sectional morphology of LFP cathodes processed by the two types of lasers revealed that nanosecond lasers require a higher pulse energy density for material removal.</p></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"9 3","pages":"Article 100753"},"PeriodicalIF":6.7,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2468217924000844/pdfft?md5=79141f475160fd48bf80443eaf56e56f&pid=1-s2.0-S2468217924000844-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141275426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation and anti-tumor effect in hepatocellular carcinoma treatment of AS1411 aptamer-targeted polyphyllin II-loaded PLGA nanoparticles","authors":"Huating Huang ,&nbsp;Aqian Chang ,&nbsp;Hulinyue Peng ,&nbsp;Jing Liu ,&nbsp;Aina Yao ,&nbsp;Yidan Ruan ,&nbsp;Pingzhi Zhang ,&nbsp;Tieshan Wang ,&nbsp;Changhai Qu ,&nbsp;Xingbin Yin ,&nbsp;Jian Ni ,&nbsp;Xiaoxv Dong","doi":"10.1016/j.jsamd.2024.100755","DOIUrl":"10.1016/j.jsamd.2024.100755","url":null,"abstract":"<div><p>Polyphyllin II (PPII) has been proven to have significant anti-liver cancer activity, but its application is limited by poor solubility, low bioavailability, and systemic toxicity caused by non-selectivity. To address the above problem, PPII was encapsulated into the Poly (lactic-<em>co</em>-glycolic acid) (PLGA) by precipitation method (PPII-NPs) for hepatocellular carcinoma treatment. Subsequently, Box–Behnken design (BBD) with three variables-three levels (3³) was utilized to optimize the PPII-NPs formulation. Under optimal conditions, the drug loading of nanoparticles reached 7.29 ± 0.08% and encapsulation efficiency was 80.98 ± 1.63%. Furthermore, aptamer AS1411 was adopted to enhance the tumor-targeting ability of nanoparticles (Apt/PPII-NPs). The drug loading of Apt/PPII-NPs was 6.25 ± 0.26%, had a spherical shape with a rough surface, a particle size of 252.3 ± 3.6 nm, and showed good slow-release performance and stability. In vitro, assays showed that the targeted modified nanoparticles had significant tumor selectivity and exerted efficient anti-tumor effects by inducing tumor cell apoptosis via the mitochondrial apoptotic pathway and death‐receptor pathway. In vivo, anti-tumor evaluation further demonstrated Apt/PPII-NPs not only effectively inhibited the growth of tumors, but also reduced PPII damage to normal tissues. In summary, this report strongly illustrated the advantages of a targeted nanoparticle platform for providing a solution for the rational application of PPII and improving the therapeutic effect of hepatocellular carcinoma.</p></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"9 3","pages":"Article 100755"},"PeriodicalIF":8.0,"publicationDate":"2024-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2468217924000868/pdfft?md5=7c0fc26ee17c2d02c050d8754cc14746&pid=1-s2.0-S2468217924000868-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141280398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative study of β-cyclodextrin and carboxymethyl-β-cyclodextrin as effective drug delivery systems for oxymetholone: Design, preparation, characterization, phase solubility and in vitro drug release studies","authors":"Mehrdad Hadadian ,&nbsp;Reza Allahyari ,&nbsp;Behnam Mahdavi ,&nbsp;Majid Mohammadhosseini","doi":"10.1016/j.jsamd.2024.100751","DOIUrl":"https://doi.org/10.1016/j.jsamd.2024.100751","url":null,"abstract":"<div><p>Cyclodextrins (CDs) are well-known agents in drug delivery systems as they can improve the physical properties of drugs with their distinctive features. Oxymetholone (OXYM) is a derivative of testosterone, a steroid drug that is widely used in the treatment of various diseases. In the current research, the inclusion complexes of OXYM with carboxymethyl-β-cyclodextrin (CM-β-CD/OXYM) and β-cyclodextrin (β-CD/OXYM) have been successfully prepared to improve stability, solubility, and biopharmaceutical profile of OXYM. The characterization of the prepared inclusion complexes was carried out using FT-IR, XRD, TGA, DLS, BET, and UV–Vis techniques. In addition, the morphology of the synthesized inclusion complexes was evaluated in terms of their FE-SEM images. The encapsulation efficiency (EE%), phase solubility, and <em>in vitro</em> drug release of the products were also evaluated using a simple spectrophotometric method. In addition, the kinetic study of <em>in vitro</em> drug release was conducted using the appropriate mathematical equations. In view of the findings of this study, a higher solubility was observed for CM-β-CD/OXYM compared to β-CD/OXYM, nearly three times higher. Furthermore, the <em>in vitro</em> drug release study indicated that β-CD/OXYM offers higher release rates, and the kinetic study demonstrated that both carriers follow a non-Fickian mechanism.</p></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"9 3","pages":"Article 100751"},"PeriodicalIF":8.0,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2468217924000820/pdfft?md5=f0de280e8a9aca631ec24883ecbdbf74&pid=1-s2.0-S2468217924000820-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141428837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nickel/ceria nanorod catalysts for the synthesis of substitute natural gas from CO2: Effect of active phase loading and synthesis condition","authors":"Tri Nguyen ,&nbsp;Ba Long Do ,&nbsp;Phung Anh Nguyen ,&nbsp;Thi Thuy Van Nguyen ,&nbsp;Cam Anh Ha ,&nbsp;Tien Cuong Hoang ,&nbsp;Cam Loc Luu","doi":"10.1016/j.jsamd.2024.100752","DOIUrl":"https://doi.org/10.1016/j.jsamd.2024.100752","url":null,"abstract":"<div><p>CO₂ methanation is one of the advantageous processes of carbon capture and utilisation (CCU) technologies to circulate the carbon on Earth, mitigating the release and loss of CO₂ into the atmosphere. Herein, a Ni/r-CeO₂ catalyst was fabricated using a facile method of impregnating Ni(NO₃)₂·6H₂O on CeO₂ nanorods (r-CeO₂), synthesised by hydrothermal method at low temperature (130 °C). The influence of Ni active phase content and activation condition on the characteristics and catalytic performances in CO₂ methanation were investigated. The physicochemical properties of the synthesised catalyst were studied using several techniques: XRD, EDS, isotherm nitrogen adsorption, SEM, HR-TEM, H₂-TPR, CO₂-TPD and Raman. Catalytic activity survey and analysis show the excellent performance of Ni/r-CeO₂ with a Ni loading of 15 wt% (15NiCe) calcined at 600 °C for 4 h and reduced at 450 °C for 2.5 h. By adjusting the nickel loading on ceria and altering synthesis conditions, it's possible to achieve highly dispersed NiO particles with an optimal size (∼13.9 nm), abundant oxygen vacancies, and the presence of medium-strength basic sites. This leads to improved catalytic activity, resulting in an equilibrium CO₂ conversion rate of approximately 90% and 100% selectivity for CH₄ at temperatures as low as 325°C. The 15Ni/r-CeO₂ catalyst serves as a highly active low-temperature catalyst for CO₂ methanation.</p></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"9 3","pages":"Article 100752"},"PeriodicalIF":8.0,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2468217924000832/pdfft?md5=3f198cff6d4fed9278b56a506b5d4746&pid=1-s2.0-S2468217924000832-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141250265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Active carbon derived from rice husk as sustainable substitutes for costly platinum electrodes in dye-sensitized solar cells","authors":"M.I.U. Weerasinghe ,&nbsp;P.M.L. Kumarage ,&nbsp;I.G.K.D. Amarathunga ,&nbsp;T.M.W.J. Bandara ,&nbsp;D. Velauthapillai ,&nbsp;B.C. Karunarathne ,&nbsp;R. Punniamoorthy ,&nbsp;R.M.G. Rajapakse ,&nbsp;G.R.A. Kumara","doi":"10.1016/j.jsamd.2024.100749","DOIUrl":"10.1016/j.jsamd.2024.100749","url":null,"abstract":"<div><p>Significant financial and environmental challenges are associated with using platinum electrodes as counter electrodes (CEs) in dye-sensitized solar cells (DSCs). This work uses rice husk, an agricultural waste, to create active carbon that is appropriate for DSC CEs in response to these difficulties. A simple spray pyrolysis technique created activated carbon obtained from rice husks. The DSC employing activated rice husk carbon as the CE demonstrated a conversion efficiency of 6.06%, slightly lower than the 8.21% efficiency achieved with a platinum electrode-based cell. However, this performance gap is overshadowed by the substantial cost reduction enabled by the utilization of low-cost activated carbon compared to noble metal alternatives. This result introduces promising avenues for investigating the use of agriculturally derived carbon materials as workable and affordable options for platinum CEs in DSCs, thereby contributing to the sustainable advancement of photovoltaic systems. Even though the performance of DSC that uses activated carbon derived from rice husk in CE is slightly lower than its counterparts based on platinum, the cost reduction due to the use of low-cost activated carbon with noble metal is significant.</p></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"9 3","pages":"Article 100749"},"PeriodicalIF":8.0,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2468217924000807/pdfft?md5=9f910c739212872f02726f0a6d827b69&pid=1-s2.0-S2468217924000807-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141145548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural, morphological, optical and electrical properties of ferrite-based nanoparticles synthesized flexible substrate for chemical sensing application","authors":"Ismail Hossain ,&nbsp;Mohammad Tariqul Islam ,&nbsp;Norsuzlin Mohd Sahar ,&nbsp;Md Samsuzzaman ,&nbsp;Ahmed Alzamil ,&nbsp;Mohamed S. Soliman","doi":"10.1016/j.jsamd.2024.100750","DOIUrl":"10.1016/j.jsamd.2024.100750","url":null,"abstract":"<div><p>A compact Ca_xCo_(0.90-x)Zn_0.10Fe₂O₄ based nanoparticles synthesized flexible microwave substrate with single negative (SNG) metamaterial is being successfully fabricated for industrial chemical contamination sensing applications. The unit cell dimensions of the MTM are 0.114λ × 0.114 λ × 0.017 λ. The nanoparticles, derived from the Ca_xCo_(0.90-x)Zn_0.10Fe₂O₄ material with varying Ca concentrations (Ca25, Ca50, and Ca75), have been synthesized using a sol-gel method, and their structural, morphological, and dielectric properties have been comprehensively characterized. Dielectric constants and loss tangents have been measured over the frequency range of 2–20 GHz. Simulation of the S₂₁ response at 3.43 GHz, 6.50 GHz, 11.49 GHz, and 16.46 GHz has yielded maximum magnitudes of −52.78 dB, −48.07 dB, −52.16 dB, and −39.37 dB, respectively. Experimental verification on an FR-4 rigid substrate at 3.28 GHz, 6.58 GHz, 11.76 GHz, and 16.33 GHz has revealed magnitudes of −25.67 dB, −24.56 dB, −31.13 dB, and −25.17 dB. Finally, when fabricated on the flexible microwave substrate, the MTM displayed S21 responses of −48.31 dB, −43.12 dB, −61.80 dB, and −24.70 dB at 3.19 GHz, 6.62 GHz, 11.58 GHz, and 16.65 GHz, respectively. The MTM has exhibited SNG properties in distinct frequency bands and near-zero index (NZI) characteristics. The sensitivity, figure of merit (FOM), and Q-factor have been achieved at 0.096 GHz/RIU, 0.152 GHz/RIU, 0.846 (RIU⁻¹), 0.846 (RIU⁻¹), and 8.430, 29.801, respectively. Its performance has been validated through simulation, VNA measurements, and advanced design system (ADS) software analysis, showcasing promise for diverse applications in S-, C-, X-, and Ku-bands. The anticipated structure performs well in terms of its small size, flexibility, sensitivity, and lightweight, making it suitable for wireless communications and methanol and ethanol contamination sensing in industrial applications.</p></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"9 3","pages":"Article 100750"},"PeriodicalIF":6.7,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2468217924000819/pdfft?md5=24172e638a0754e378ec04925e30687c&pid=1-s2.0-S2468217924000819-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141131792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modulating the electrocatalytic reduction of CO2 to CO via surface reconstruction of ZnO nanoshapes","authors":"Mustapha Umar ,&nbsp;Mohammed Yousef Aljezan ,&nbsp;Ismail Abdulazeez ,&nbsp;Abduljamiu O. Amao ,&nbsp;Saheed A. Ganiyu ,&nbsp;Khalid Alhooshani","doi":"10.1016/j.jsamd.2024.100748","DOIUrl":"https://doi.org/10.1016/j.jsamd.2024.100748","url":null,"abstract":"<div><p>The electrocatalytic conversion of carbon dioxide (CO₂) into valuable chemicals presents a promising strategy for closing the carbon cycle. In this study, we synthesized zinc (Zn) catalysts through hydrothermal methods using either polyvinylpyrrolidone (PVP) or cetyltrimethylammonium bromide (CTAB) as stabilizing agents. These catalysts proved highly efficient in converting CO₂ into carbon monoxide (CO). Our findings revealed that ZnO, synthesized with different morphologies—namely, nanoneedles (ZnO-NN) and nanorods (ZnO-NR)—underwent significant electro-reconstruction, ultimately leading to the formation of hexagonal metallic Zn crystals, regardless of their initial characteristics. Utilizing ex-situ operando techniques, we elucidated that metallic Zn serves as the active phase for the CO₂-to-CO conversion process. In a comparison, ZnO-NN catalysts demonstrated superior selectivity and stability, achieving 91.3% CO selectivity at a potential of −0.88 V vs. RHE (Reversible Hydrogen Electrode) due to the facile transformation of ZnO to metallic Zn. Remarkably, these catalysts maintained this level of performance for more than 17 h. Conversely, ZnO-NR catalysts exhibited a lower CO selectivity of 62.5% at a relatively higher potential of −0.98 V vs RHE.</p></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"9 3","pages":"Article 100748"},"PeriodicalIF":8.0,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2468217924000790/pdfft?md5=34a1ccd46db23f96f70243172df40fc4&pid=1-s2.0-S2468217924000790-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141097825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Localized surface plasmon resonance properties of green synthesized Ag/rGO composite nanoparticles utilizing Amaranthus viridis extract for biosensor applications","authors":"Putri Dwi Jayanti ,&nbsp;Zurnansyah ,&nbsp;Hafil Perdana Kusumah ,&nbsp;Larrisa Jestha Mahardhika ,&nbsp;Muhammad Riswan ,&nbsp;Sari Wahyuni ,&nbsp;Nanang Adrianto ,&nbsp;Rona Cuana ,&nbsp;Nurul Imani Istiqomah ,&nbsp;Huma Ali ,&nbsp;Daoud Ali ,&nbsp;Chotimah ,&nbsp;Edi Suharyadi","doi":"10.1016/j.jsamd.2024.100747","DOIUrl":"https://doi.org/10.1016/j.jsamd.2024.100747","url":null,"abstract":"<div><p>The green synthesized Ag/rGO composite nanoparticles were successfully synthesized using the Hummers' method with <em>Amaranthus viridis</em> extract. The localized surface plasmon resonance (LSPR) behavior of the Ag/rGO was studied using the Kretschmann configuration consisting of prism/Au/Ag/rGO/air. The addition of the Ag/rGO composite to the prism system aims to determine the effect of rGO on the SPR angle. X-ray diffraction results showed that there were four diffraction peaks with the presence of lattice planes (111), (200), (220), and (311), proving the face-centered cubic crystal structure of silver. The characterization results showed that the size of Ag NPs was 23.1 nm, and that of Ag/rGO composite was 16.7 nm. The EDX results of the Ag/rGO composite showed the presence of several elements such as C, O, Ag, and N. Fourier transform infrared analysis showed the presence of O–H, C–H, C<img>O, C<img>C, and C–<em>O</em>–C functional groups confirming the formation of Ag/rGO. The UV–Vis spectra showed an absorption peak at 257 nm and 346–412 nm with an increase in band gap energy from 3.27 eV to 3.40 eV. Meanwhile, the LSPR measurements demonstrate a shift in the SPR angle due to the addition of rGO, in which the angle shifts from 0.33 <span><math><mrow><mo>°</mo></mrow></math></span> to 0.96 <span><math><mrow><mo>°</mo></mrow></math></span>. In conclusion, the addition of rGO can optimize the plasmonic properties of Ag, so that it potentially could be applied to enhance the performance of SPR-based biosensor applications.</p></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"9 3","pages":"Article 100747"},"PeriodicalIF":8.0,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2468217924000789/pdfft?md5=ca6cc3682467cca0fac4696af97c2968&pid=1-s2.0-S2468217924000789-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141095398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}