Journal of Applied Biomaterials & Functional Materials最新文献

{"title":"Pressure and Thickness Dependence of Physical Properties of ZnO:Ga Thin Films by Radio Frequency Magnetron Sputtering","authors":"Fang-Hsing Wang, Hua-Tz Tzeng","doi":"10.35745/afm2022v02.02.0005","DOIUrl":"https://doi.org/10.35745/afm2022v02.02.0005","url":null,"abstract":"Indium-free transparent conducting oxide films have attracted extensive attention in the field of optoelectronics. Ga-doped ZnO (GZO) thin films are deposited by radio frequency magnetron sputtering on glass substrates at a temperature of 200 °C with ZnO:Ga2O3 (3 wt%). The structural, electrical, and optical properties of the GZO thin films were investigated in terms of deposition pressure and film thickness variations. X-ray diffraction analysis showed that all the prepared GZO films exhibited hexagonal wurtzite crystal structure with a (002) preferential orientation along the c-axis, regardless of pressure and thickness. The average visible transmittance (including the glass substrate) in a wavelength range of 400–700 nm decreased with increasing thickness but varied less with pressure. The highest average visible transmittance reached 88.4% at the thickness of 150 nm and the pressure of 5 mTorr. The optical band gap of the GZO films calculated using Tauc’s method was in the range of about 3.6–3.9 eV. The resistivity of GZO thin films decreased with decreasing deposition pressure and increasing film thickness, and the minimum resistivity obtained at 5 mTorr and 1000 nm was 3.36 × 10-4 Ω-cm. The maximum figure of merit (FOM) of 3.09 × 10-2 Ω-1 was achieved at 5 mTorr and 1000 nm. The superior optical and electrical properties and high FOM show that the prepared GZO thin films are suitable for transparent conducting films and optoelectronic devices.","PeriodicalId":14985,"journal":{"name":"Journal of Applied Biomaterials & Functional Materials","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83667650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Cobalt Composition on Electrochemical Behavior of Platinum-Based Catalyst towards Hydrogen Evolution Reaction","authors":"Duc Thanh Nguyen, Hang Thi Thuy Nguyen, Hung Cam Ly, An Thi Xuan Duong","doi":"10.35745/afm2022v02.02.0001","DOIUrl":"https://doi.org/10.35745/afm2022v02.02.0001","url":null,"abstract":"The hydrogen production from water electrolysis is of interest as a renewable energy generation technology. However, the high price of noble platinum (Pt) catalysts for the hydrogen evolution reaction (HER) is a big challenge to use it. Herein, we fabricate cost-effective CoPt bimetallic alloys and explore the effect of Co composition on the electrochemical behavior of such alloys, which has been rarely reported. A series of Co1-xPtx (x = 0.25; 0.5; 0.75) alloys are prepared via a room-temperature chemical reduction route without using any surfactants/stabilizers that exhibit a uniform distribution in small particle sizes (ca. 3 nm) on the carbon surface. In terms of the HER, the incorporation of a suitable Co proportion into the Pt lattices enhance significantly the HER performance in an acidic environment. For instance, the Co0.5Pt0.5 NPs/C catalyst displays a low onset potential (16.67 mV) and a small Tafel slope (19.60 mV dec-1), which is different from other Co1-xPtx catalysts and commercial C-supported Pt (NPs) catalyst. This research result not only supplies a facile strategy to synthesize alloys but also guides the choice of a suitable proportion of transition metal into Pt lattice for electrochemical reactions in green energy storage and conversion technologies.","PeriodicalId":14985,"journal":{"name":"Journal of Applied Biomaterials & Functional Materials","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77921667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electron Cloud Densitometry of Inner and Valence Electrons in Carbon Allotropes","authors":"O. Kucherov","doi":"10.35745/afm2022v02.01.0002","DOIUrl":"https://doi.org/10.35745/afm2022v02.01.0002","url":null,"abstract":"Electron cloud densitometry of carbon allotropes is presented in this study. Carbon consists of two inner and four valence electrons. The valence electrons in carbon are hybridized or active. Each active valence electron builds a negatively charged shape due to their delocalization. It is proved that the active valence electron creates the van der Waals force, which bonds layers of crystalline graphite together. An easy quantum mechanical explanation of the electron cloud densitometry is given in this study. In accordance with this effect, an atom begins to illuminate, depicting its shape. Electron cloud densitometry images show the inner and valence electrons in the applied functional materials, such as activated coke, graphite, graphene, and diamond.","PeriodicalId":14985,"journal":{"name":"Journal of Applied Biomaterials & Functional Materials","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2022-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86536085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Synthesis Time on Synthesis and Photoluminescence Properties of ZnO Nanorods","authors":"Cheng-Fu Yang, Chingfu Wang, Fang-Hsing Wang, Han-Wen Liu, J. Mičová","doi":"10.35745/afm2022v02.01.0003","DOIUrl":"https://doi.org/10.35745/afm2022v02.01.0003","url":null,"abstract":"With the hydrothermal method, the p-type silicon <100> wafer was used as the substrate to synthesize ZnO nanorods in different synthesis times. To prepare the ZnO seed layer on the p-type silicon <100> wafer, a prepared ZnO gel was deposited as the seed layer using the spin coating method. A 0.2 M solution of zinc acetate dihydrate (Zn(CH3COO)2-2H2O) and hexamethylenetetramine ((CH2)6N4) were used as the source materials at a synthesis temperature of 90 °C. The synthesis time was changed from 10 to 60 min as the synthesis parameter. X-ray diffraction patterns, scanning electron microscopy, and a focused ion beam system were used to analyze and compare the crystal characteristics and the heights and widths of synthesized ZnO nanorods. We found that the crystal characteristics, the heights and widths, and the photoluminescence properties of synthesized ZnO nanorods were dependent on the synthesis time.","PeriodicalId":14985,"journal":{"name":"Journal of Applied Biomaterials & Functional Materials","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2022-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74023794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of MAPBI3 Annealing Temperature on Perovskite Solar Cell","authors":"Tung-Lung Wu, J. Tsai, Yaxin Song, Tangxi Chen, T. Wu, Kao-Wei Min, Ming-Ta Yu, Chi-Ting Ho","doi":"10.35745/afm2022v02.01.0005","DOIUrl":"https://doi.org/10.35745/afm2022v02.01.0005","url":null,"abstract":"This study mainly is carried out to discuss the effect of nitrogen annealing temperature on perovskite solar cells. The annealing temperature affects perovskite solar cells during the annealing process. It also affects the formation of perovskite crystals. Perovskite crystals need to form in a nitrogen box for manufacturing Perovskite solar cells. Spin-coating MAPbI3 on the substrate is annealed with a nitrogen furnace tube to form perovskite crystals. The remaining PbI2 after the annealing is completed to improve the efficiency of perovskite solar cells. The optimal temperature for the formation of perovskite crystals is found by adjusting the annealing temperature. By using UV-visible spectrometer, field emission-scanning electron microscope, and measurements of photoelectric conversion efficiency, cell structure and optoelectronic properties are analyzed as the final results.","PeriodicalId":14985,"journal":{"name":"Journal of Applied Biomaterials & Functional Materials","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2022-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88976269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Failure Behaviour of Carbon-Epoxy Composite in Crack Arrester and Crack Divider Mode","authors":"Majee Kumar Swarup, Das Jiten, S. Seetaraman","doi":"10.35745/afm2022v02.01.0001","DOIUrl":"https://doi.org/10.35745/afm2022v02.01.0001","url":null,"abstract":"Failure behaviour of a carbon-epoxy composite is studied both in crack arrester (CA) and crack divider(CD) mode by conducting 3-point bend test of un-notched (UN) and single edge pre-crack notched (N) (notch depth varied from 0.5 to 3.3 mm) specimens at various cross head speeds(CHS) such as 0.2, 50, 100, 200 and 500 mm/min. Influence of notch depth (ND) and CHS on the conditional fracture toughness(CFT) is understood using ANOVA. In both the mode, while the CFT values varies linearly with CHS, its values are observed to be lower at short ND, higher at medium ND and again lower at high ND. In both the modes at high ND (~3.3mm) opening mode/fibre breaking (mode I) failure occurs because of high crack tip stress concentration (as analysed from ANSYS 15.0) which cause fibre failure at the tip and corresponding Mode I fracture toughness was observed to be~20 MPa.m0.5. The composite also shows similar flexural strength both in CA mode (641+48) and in CD mode (634+49 MPa). In CD mode N specimen predominantly fails by mode I. While in CD mode the delamination (mode II) is only observed in UN specimens, in CA mode UN or small N specimen shows mode II failure and medium notched specimen shows mixed mode failure. In CA mode, number of delaminated layer is higher for the specimen tested at high CHS. In CA mode during charpy test (strain rate 103/s), the composite shows numerous delamination and absorbed much higher energy(~40J/cm2) than that in CD (~10J/cm2) mode where mode I failure is predominant. During impact test, lowering of test temperature to -40oC has very little effect on the impact energy since it does not significantly affect the mode of failure.","PeriodicalId":14985,"journal":{"name":"Journal of Applied Biomaterials & Functional Materials","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2022-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90100976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of ZnO-doped magnesium phosphate cements on osteogenic differentiation of mBMSCs in vitro.","authors":"Xiaomei Wang,&nbsp;Feng Shi,&nbsp;Dechuan Zhao,&nbsp;Yonggang Yan","doi":"10.1177/22808000221136369","DOIUrl":"https://doi.org/10.1177/22808000221136369","url":null,"abstract":"<p><p>The insufficient osteogenesis of magnesium phosphate cements (MPCs) limits its further application. It is significant to develop a bioactive MPC with osteogenic properties. In this work, MPCs were reinforced by zinc oxide nanoparticles (ZnO-NPs). The composition, microstructure, setting time, compressive strength and degradation of ZnO-NPs/MPCs (ZNMPCs) were evaluated. The results showed that the setting times of MPCs were prolonged from 8.2 to 25.3 min (5.0ZNMPC). The exothermic temperatures were reduced from 45.8 ± 0.4℃ (MPCs) to 39.3 ± 0.5℃ (1.0ZNMPC). The compressive strength of ZNMPC composite cement with 1 wt. % ZnO-NPs (1.0ZNMPC) was the highest (42.9 MPa) among all the composite cements. Furthermore, the ZNMPCs were cultured with mouse bone marrow mesenchymal stem cells (mBMSCs). The results yielded that the ZNMPCs exhibited good cytocompatibility with enhanced differentiation, proliferation, and mineralization on mBMSCs, and it also pronouncedly elevated the expressions of genes and proteins involving osteogenesis. These findings suggested that ZNMPCs could drive the differentiation toward osteogenesis and mineralization of mBMSCs, providing a simple way to the MPC with enhanced osteogenesis for further orthopedic applications.</p>","PeriodicalId":14985,"journal":{"name":"Journal of Applied Biomaterials & Functional Materials","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40490751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermal investigation and physiochemical interaction of H₂O and C₂H₆O₂ saturated by Al₂O₃ and γAl₂O₃ nanomaterials.","authors":"Khalid Abdulkhaliq M Alharbi,&nbsp;Adnan","doi":"10.1177/22808000221136483","DOIUrl":"https://doi.org/10.1177/22808000221136483","url":null,"abstract":"<p><strong>Applications: </strong>The interaction of nanoparticles and base solvents of different nature attained much interest of the researchers in the recent time. These use in medication, detection of cancer cells, applied thermal engineering, and electrical and mechanical engineering. Among the broad range of applications, investigation of nanofluid through converging/diverging channel is important which is of much interest in the field of medical sciences.</p><p><strong>Purpose and methodology: </strong>The core purpose of this study is to introduce a new heat transfer model for two natures of nanofluids with bi host solvents. The model in hand achieved through nanofluid expressions, similarity equations and induction of novel dissipation effects. At later stage, numerical treatment is performed to explore the actual behaviour of nanofluids inside the oblique walls which is very important.</p><p><strong>Core findings: </strong>From the drawn results, it is found that the motion could be controlled by expanding the channel walls (<math><mrow><mi>α</mi><mo>=</mo><msup><mn>5</mn><mi>o</mi></msup></mrow></math>) and high Re and in Al₂O₃-H₂O it is optimum. The nanofluids based on Al₂O₃ and C₂H₆O₂ have much ability to transmit heat than the other nanofluids. Moreover, dissipation effects (<math><mrow><mi>E</mi><mi>c</mi><mo>=</mo><mn>0</mn><mo>.</mo><mn>1</mn><mo>,</mo><mn>0</mn><mo>.</mo><mn>2</mn><mo>,</mo><mn>0</mn><mo>.</mo><mn>3</mn><mo>,</mo><mn>0</mn><mo>.</mo><mn>4</mn></mrow></math>) played significant role and boosted the temperature while keeping <math><mrow><mi>R</mi><mi>e</mi><mo>=</mo><mn>70</mn><mo>,</mo><mi>α</mi><mo>=</mo><msup><mn>5</mn><mi>o</mi></msup></mrow></math> and <math><mrow><mi>α</mi><mo>=</mo><mo>-</mo><msup><mn>5</mn><mi>o</mi></msup></mrow></math>, respectively. Also, the study is validated and achieved good agreement between existing and the current study.</p>","PeriodicalId":14985,"journal":{"name":"Journal of Applied Biomaterials & Functional Materials","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10406915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Antimicrobial potential of AH Plus supplemented with bismuth lipophilic nanoparticles on <i>E. faecalis</i> isolated from clinical isolates.","authors":"Jesús Alejandro Torres-Betancourt,&nbsp;Rene Hernandez-Delgadillo,&nbsp;Jorge Jaime Flores-Treviño,&nbsp;Juan Manuel Solís-Soto,&nbsp;Nayely Pineda-Aguilar,&nbsp;Maria Argelia Akemi Nakagoshi-Cepeda,&nbsp;Rosa Isela Sánchez-Nájera,&nbsp;Shankararaman Chellam,&nbsp;Claudio Cabral-Romero","doi":"10.1177/22808000211069221","DOIUrl":"https://doi.org/10.1177/22808000211069221","url":null,"abstract":"<p><p>The objective of this study was to determine the antimicrobial potential of AH plus supplemented with bismuth lipophilic nanoparticles (BisBAL NPs) on the growth of <i>Enterococcus faecalis</i> isolated from patients with endodontic infections. BisBAL NPs, synthesized with the colloidal method, were characterized, in its pure form or AH Plus-absorbed, by energy-dispersive X-ray spectroscopy and scanning electron microscopy (EDS-SEM). Antimicrobial activity was evaluated with disc diffusion assays, and antibiofilm activity with fluorescence microscopy. BisBAL NP-supplemented AH Plus had a 4.9 times higher antimicrobial activity than AH Plus alone (<i>p</i> = 0.0001). In contrast to AH Plus alone, AH Plus supplemented with BisBAL NP inhibited <i>E. faecalis</i> biofilm formation. The sealing properties of AH plus were not modified by the incorporation of BisBAL NPs, which was demonstrated by a 12-day split-chamber leakage assay with daily inoculation, which was used to evaluate the possible filtration of <i>E. faecalis</i>. Finally, BisBAL NP-supplemented AH plus-BisBAL NPs was not cytotoxic for cultured human gingival fibroblasts. Their viability was 83.7% to 89.9% after a 24-h exposure to AH Plus containing 50 and 10 µM BisBAL NP, respectively. In conclusion, BisBAL NP-supplemented AH Plus constitutes an innovative nanomaterial to prevent re-infection in endodontic patients without cytotoxic effects.</p>","PeriodicalId":14985,"journal":{"name":"Journal of Applied Biomaterials & Functional Materials","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39747426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of sea urchin type silica stabilised zirconia nanospheres with enhanced antimicrobial and osteoactivity properties.","authors":"Jiyu Han,&nbsp;Siyu Liu,&nbsp;Songtao Ai,&nbsp;Daqian Wan","doi":"10.1177/22808000221136367","DOIUrl":"https://doi.org/10.1177/22808000221136367","url":null,"abstract":"<p><p>Zirconia based ceramics are giving new hope in hard tissues replacement and implants application. Among the three forms of zirconia (ZrO₂), tetragonal form (<i>t</i>-ZrO₂) possess high mechanical stability in comparison with the other two which makes it suitable for fabricating biomedical implants with enhanced osteo activity. Here, tetragonal phase nanospheres consisting of silica stabilised zirconia (1:1) were prepared via sol gel method. The nanospheres exhibit sea urchin type morphology as observed from FESEM analysis. XRD patterns confirm the formation of t -SiO₂-ZrO₂ binary phase after high temperature calcination at 650°C. The immersion studies in SBF help in the formation of a layer of apatite in a gradual manner over the pallets for the period of 7, 14, 21 and 28 days which was confirmed by XRD, FTIR analysis. Moreover, t- SiO₂ - ZrO₂ samples were subjected to cytotoxicity tests through MTT assay on MG-63 cell lines. Antibacterial properties were investigated quantitatively using colony forming unit method against both gram positive as well as gram-negative bacteria.</p>","PeriodicalId":14985,"journal":{"name":"Journal of Applied Biomaterials & Functional Materials","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40473829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}