Tool wear is an important problem when cutting hard-to-cut materials such as stainless steel and nickel alloys. This unignorable disadvantage is caused by the diffusion of dissociated carbon atoms to the surface layer of the tool tip during the cutting process, and this has been confirmed by SEM/EDS analysis of worn tool tips. In this study, a novel cutting method is proposed in which chemically activated H2O molecules are introduced to the cutting tool tip in order to prevent tool wear by removing dissociated carbon atoms on the surface layer of the tool tip. In cutting experiments, stainless steel X5CrNi 18-10 (JIS SUS304), a cemented carbide tool tip, cutting oil, steam, and Ar plasma were used. Ar plasma was used for raising the steam temperature around the tool tip and chemically activating H2O molecules. From the results, the dissociated carbon and constituted knife edge were mostly removed by H2O steam and cutting oil without Ar plasma. However, in some cases using Ar plasma, the workpiece melted and tightly adhered to the cutting face of the tool tip. This suggests that the H2O steam temperature should be suitably controlled so as to remove carbon atoms effectively from the cutting face of the tool tip.
{"title":"Low Tool Wear Cutting Method Using H2O Radical","authors":"Hiromichi Toyota, Ryoya Shiraishi, Hidekazu Goto, Xia Zhu, Yukiharu Iwamoto, Syoma Tamura","doi":"10.4028/p-u3UHMv","DOIUrl":"https://doi.org/10.4028/p-u3UHMv","url":null,"abstract":"Tool wear is an important problem when cutting hard-to-cut materials such as stainless steel and nickel alloys. This unignorable disadvantage is caused by the diffusion of dissociated carbon atoms to the surface layer of the tool tip during the cutting process, and this has been confirmed by SEM/EDS analysis of worn tool tips. In this study, a novel cutting method is proposed in which chemically activated H2O molecules are introduced to the cutting tool tip in order to prevent tool wear by removing dissociated carbon atoms on the surface layer of the tool tip. In cutting experiments, stainless steel X5CrNi 18-10 (JIS SUS304), a cemented carbide tool tip, cutting oil, steam, and Ar plasma were used. Ar plasma was used for raising the steam temperature around the tool tip and chemically activating H2O molecules. From the results, the dissociated carbon and constituted knife edge were mostly removed by H2O steam and cutting oil without Ar plasma. However, in some cases using Ar plasma, the workpiece melted and tightly adhered to the cutting face of the tool tip. This suggests that the H2O steam temperature should be suitably controlled so as to remove carbon atoms effectively from the cutting face of the tool tip.","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"23 8","pages":"15 - 23"},"PeriodicalIF":0.0,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138955209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this study, synthesis of reduced graphene oxide-iron oxide-silica dioxide (rGO/Fe3O4/SiO2) was done through a facile chemical process. Physical characterization was carried out as such Fourier transform infrared spectroscopy (FTIR) which confirmed the presence of silica peak in the spectrum of rGO/Fe3O4/SiO2, while RAMAN displayed the vibrational bands of carbon materials studied. Results of SEM-EDX and TEM confirmed the unification of SiO2 on rGO/Fe3O4 nanocomposite with difference in morphologic structure. X-ray diffraction (XRD) analysis exhibited that addition of SiO2 increased the crystalline size of the nanocomposite. Nitrogen adsorption isotherm analysis describes the nanocomposites fall in the mesopore region. The nanocomposite was then drop-casted on the surface of glassy carbon electrode (GCE) for fabrication of the electrode which denoted as rGO/Fe3O4/SiO2/GCE. Electrochemical characterization of modified electrode was studied using electron impedance spectroscopy (EIS), which showed the minimal resistance charge transfer. Oxygen reduction reaction analysis shows that electrocatalytic reduction of oxygen was excellent with four-electron transfer when calculated using Randles-Sevcik equation. All the analysis was compared to the nanocomposites without the addition of silica oxide (rGO/Fe3O4). This work proves that addition of nanoparticle in a compound as a matrix improves the oxygen reduction potential of rGO/Fe3O4/SiO2/GCE composite.
{"title":"The Influence of Silica Dioxide in the Electrocatalytic Performances of rGO/Fe3O4 as Oxygen Reduction Electrocatalyst","authors":"F. Yusoff, Karthi Suresh","doi":"10.4028/p-XRDbR5","DOIUrl":"https://doi.org/10.4028/p-XRDbR5","url":null,"abstract":"In this study, synthesis of reduced graphene oxide-iron oxide-silica dioxide (rGO/Fe3O4/SiO2) was done through a facile chemical process. Physical characterization was carried out as such Fourier transform infrared spectroscopy (FTIR) which confirmed the presence of silica peak in the spectrum of rGO/Fe3O4/SiO2, while RAMAN displayed the vibrational bands of carbon materials studied. Results of SEM-EDX and TEM confirmed the unification of SiO2 on rGO/Fe3O4 nanocomposite with difference in morphologic structure. X-ray diffraction (XRD) analysis exhibited that addition of SiO2 increased the crystalline size of the nanocomposite. Nitrogen adsorption isotherm analysis describes the nanocomposites fall in the mesopore region. The nanocomposite was then drop-casted on the surface of glassy carbon electrode (GCE) for fabrication of the electrode which denoted as rGO/Fe3O4/SiO2/GCE. Electrochemical characterization of modified electrode was studied using electron impedance spectroscopy (EIS), which showed the minimal resistance charge transfer. Oxygen reduction reaction analysis shows that electrocatalytic reduction of oxygen was excellent with four-electron transfer when calculated using Randles-Sevcik equation. All the analysis was compared to the nanocomposites without the addition of silica oxide (rGO/Fe3O4). This work proves that addition of nanoparticle in a compound as a matrix improves the oxygen reduction potential of rGO/Fe3O4/SiO2/GCE composite.","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"65 16","pages":"143 - 149"},"PeriodicalIF":0.0,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138956953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Khanh Dien Le, Huu Han Ho, Thanh Nam Nguyen, Trung Le Tran, Trinh Nguyen Le, Dinh Hai Vu
Although the Incremental Sheet Forming (ISF) technology has been studied and applied from the last decade of the previous century with more than 30 years of experiences and ameliorations of the researchers of this field, but the ability of deformation of the formed material sheet still has remained in a restrictive modest value. This sheet forming technology could be divided into 2 mains branches: Single Point Incremental Forming (SPIF) and Two Point Incremental Forming (TPIF) wherein the first one is usually applying in research and the second branch is used in production. The ISF is suitable for forming sheet for a single product or for small batch production with a great advantage of a no-need pestle and mold manufacture in advance, but the formability of formed sheet material cannot bigger than a limited formed angle of about 80o that depends on the material and the forming parameters. There are some ameliorations for increasing the formability of the formed sheet such as heating the formed sheet in Hot SPIF or Multistage SPIF (MSPIF)… All the effort and amelioration measures are confronted with different difficulties. In this paper, we concentrate to study on the MSPIF technology on stainless steel SUS304 by simulation method with the proof of experimental method. The results were also compared to the simple SPIF to show its own pros and cons on the related field such as the technology, the productivity and the lubrication.
{"title":"A Research on the Enhancing of the Formability of Stainless-Steel Sheet Sus304 by Multistage Single Point Incremental Sheet Forming (MSPIF) Technology","authors":"Khanh Dien Le, Huu Han Ho, Thanh Nam Nguyen, Trung Le Tran, Trinh Nguyen Le, Dinh Hai Vu","doi":"10.4028/p-hwM6t6","DOIUrl":"https://doi.org/10.4028/p-hwM6t6","url":null,"abstract":"Although the Incremental Sheet Forming (ISF) technology has been studied and applied from the last decade of the previous century with more than 30 years of experiences and ameliorations of the researchers of this field, but the ability of deformation of the formed material sheet still has remained in a restrictive modest value. This sheet forming technology could be divided into 2 mains branches: Single Point Incremental Forming (SPIF) and Two Point Incremental Forming (TPIF) wherein the first one is usually applying in research and the second branch is used in production. The ISF is suitable for forming sheet for a single product or for small batch production with a great advantage of a no-need pestle and mold manufacture in advance, but the formability of formed sheet material cannot bigger than a limited formed angle of about 80o that depends on the material and the forming parameters. There are some ameliorations for increasing the formability of the formed sheet such as heating the formed sheet in Hot SPIF or Multistage SPIF (MSPIF)… All the effort and amelioration measures are confronted with different difficulties. In this paper, we concentrate to study on the MSPIF technology on stainless steel SUS304 by simulation method with the proof of experimental method. The results were also compared to the simple SPIF to show its own pros and cons on the related field such as the technology, the productivity and the lubrication.","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"42 2","pages":"81 - 90"},"PeriodicalIF":0.0,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138955566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Various carbon-based (i.e., carbon nanofibres (CNF), cellulose nanocrystals and graphite nanoparticles) and silicon-based nanomaterials (i.e., silica and MMT clay nanoparticles) were incorporated into neat structural epoxy adhesive (NE) (Sikadur®-30) at 0.5, 1.0 and 1.5 wt.% by means of a simple and cost-effective mixing method to produce the nanomaterial-modified epoxy adhesives (NMEAs). The performance of the NMEAs in regard with the bond characteristics and strength of cement paste (CP)-adhesive joints was investigated through conducting lap-shear test. Results showed that loading epoxy with 0.5 and 1.0 wt.% of carbon-based nanofillers, except in the case of adding 1.0 wt.% CNF, contributed to a significant enhancement in the joints’ strength, but a strength reduction the of the joints, even below those of the NE-bonded joints, was observed upon a further loading (i.e., at 1.5 wt.%). While all the joints bonded with epoxy loaded with silicon-based nanofillers at all wt.% showed a strength increase over the unfilled epoxy. The joints’ strength was found to decrease with the wt.% of the nanofillers due to particles’ agglomerations. All joints failed in a mixed cohesive and adhesive mode.
{"title":"Carbon-Based and Silicon-Based Nanomaterials for Enhanced Structural Adhesives","authors":"Mohammad Al-Zu'bi, L. Anguilano, Mizi Fan","doi":"10.4028/p-cRQ0UD","DOIUrl":"https://doi.org/10.4028/p-cRQ0UD","url":null,"abstract":"Various carbon-based (i.e., carbon nanofibres (CNF), cellulose nanocrystals and graphite nanoparticles) and silicon-based nanomaterials (i.e., silica and MMT clay nanoparticles) were incorporated into neat structural epoxy adhesive (NE) (Sikadur®-30) at 0.5, 1.0 and 1.5 wt.% by means of a simple and cost-effective mixing method to produce the nanomaterial-modified epoxy adhesives (NMEAs). The performance of the NMEAs in regard with the bond characteristics and strength of cement paste (CP)-adhesive joints was investigated through conducting lap-shear test. Results showed that loading epoxy with 0.5 and 1.0 wt.% of carbon-based nanofillers, except in the case of adding 1.0 wt.% CNF, contributed to a significant enhancement in the joints’ strength, but a strength reduction the of the joints, even below those of the NE-bonded joints, was observed upon a further loading (i.e., at 1.5 wt.%). While all the joints bonded with epoxy loaded with silicon-based nanofillers at all wt.% showed a strength increase over the unfilled epoxy. The joints’ strength was found to decrease with the wt.% of the nanofillers due to particles’ agglomerations. All joints failed in a mixed cohesive and adhesive mode.","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"65 15","pages":"151 - 159"},"PeriodicalIF":0.0,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138956954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The Swiss-type automatic lathe is designed for continuous mass production of the same product. In the research, the authors propose a combined turning process in which a joining process using the frictional welding method is introduced into the automatic lathe. If the joining process is performed with a Swiss-type automatic lathe, it is expected that the problem of a large amount of residual material due to the mechanical structure can be solved. Generally, the friction welding method is performed by a dedicated machine and is pressure controlled by a hydraulic power source, however in the case of an automatic lathe, friction welding is controlled by the feed length and feed rate. The low rigidity of automatic lathes is also concerned. In the study, the authors investigated the tensile strength and rotational bending fatigue strength of the A6061 bonding material to investigate and quantitatively evaluate the optimum friction welding conditions that can obtain good bonding results in the friction welding method using a multi-axis automatic lathe. Upset speed was the most influential factor for tensile strength and friction rotation speed was good at about 4000 rpm. This fact suggests that excessive heat input leads to a decrease in tensile strength. The tensile strength was equivalent to that of the annealed material. It also seems that the air-cooled annealing phenomenon occurs during the friction welding process. The results of rotational bending fatigue strength were similar to those of the annealed material. It is clarified that friction welding with an automatic lathe is feasible, however, the strength of the bonded material is reduced to the same level as that of the annealed material.
{"title":"A Study on a Novel Process Combines Cutting and Joining by an Automatic Lathe","authors":"Hidetake Tanaka","doi":"10.4028/p-AQwLD5","DOIUrl":"https://doi.org/10.4028/p-AQwLD5","url":null,"abstract":"The Swiss-type automatic lathe is designed for continuous mass production of the same product. In the research, the authors propose a combined turning process in which a joining process using the frictional welding method is introduced into the automatic lathe. If the joining process is performed with a Swiss-type automatic lathe, it is expected that the problem of a large amount of residual material due to the mechanical structure can be solved. Generally, the friction welding method is performed by a dedicated machine and is pressure controlled by a hydraulic power source, however in the case of an automatic lathe, friction welding is controlled by the feed length and feed rate. The low rigidity of automatic lathes is also concerned. In the study, the authors investigated the tensile strength and rotational bending fatigue strength of the A6061 bonding material to investigate and quantitatively evaluate the optimum friction welding conditions that can obtain good bonding results in the friction welding method using a multi-axis automatic lathe. Upset speed was the most influential factor for tensile strength and friction rotation speed was good at about 4000 rpm. This fact suggests that excessive heat input leads to a decrease in tensile strength. The tensile strength was equivalent to that of the annealed material. It also seems that the air-cooled annealing phenomenon occurs during the friction welding process. The results of rotational bending fatigue strength were similar to those of the annealed material. It is clarified that friction welding with an automatic lathe is feasible, however, the strength of the bonded material is reduced to the same level as that of the annealed material.","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"72 24","pages":"91 - 98"},"PeriodicalIF":0.0,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138956663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ridwan Setiawan, T. Sujitno, E. S. Siradj, Suprapto Suprapto, Hari Suprihatin
This study observed the results of plasma nitrocarburizing processes on JIS SKD61 Steel. This research aims to use a plasma nitrocarburizing process to increase the hardness and wear resistance of JIS SKD61Steel. Before plasma nitriding was carried out, the sample had undergone a pre-treatment process. The optimum hardness value obtained after the pre-treatment process was 504 HV. The optimum hardness obtained in the plasma nitrocarburizing sample was 830 HV at temperatures 500°C for 4 hours. The optimum wear resistance or specific wear results on plasma nitrocarburizing was 0.11 x10-6mm2/kg at temperatures 400°C for 4 hours and 0.08 x10-6mm2/kg at temperature 500°C for 4 hours. XRD test results show that the phase formed in the nitrocarburizing compound layer was the iron nitride, iron carbonitride FeN, FeN0.49, ε-Fe2-3N, or ε-Fe2-3(N,C). The process of plasma nitrocarburizing has improved the mechanical properties of hardness and wear resistance of SKD61 steel.
{"title":"Increasing Hardness and Wear Resistance of SKD61 Steel by Using Plasma Nitrocarburizing Proccess","authors":"Ridwan Setiawan, T. Sujitno, E. S. Siradj, Suprapto Suprapto, Hari Suprihatin","doi":"10.4028/p-x4vtyC","DOIUrl":"https://doi.org/10.4028/p-x4vtyC","url":null,"abstract":"This study observed the results of plasma nitrocarburizing processes on JIS SKD61 Steel. This research aims to use a plasma nitrocarburizing process to increase the hardness and wear resistance of JIS SKD61Steel. Before plasma nitriding was carried out, the sample had undergone a pre-treatment process. The optimum hardness value obtained after the pre-treatment process was 504 HV. The optimum hardness obtained in the plasma nitrocarburizing sample was 830 HV at temperatures 500°C for 4 hours. The optimum wear resistance or specific wear results on plasma nitrocarburizing was 0.11 x10-6mm2/kg at temperatures 400°C for 4 hours and 0.08 x10-6mm2/kg at temperature 500°C for 4 hours. XRD test results show that the phase formed in the nitrocarburizing compound layer was the iron nitride, iron carbonitride FeN, FeN0.49, ε-Fe2-3N, or ε-Fe2-3(N,C). The process of plasma nitrocarburizing has improved the mechanical properties of hardness and wear resistance of SKD61 steel.","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"107 24","pages":"61 - 68"},"PeriodicalIF":0.0,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138958776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Masato Okada, Seito Yoshita, M. Nikawa, Naho Hasegawa
A novel edge treatment method that utilizes a tip-burnishing process with an active rotary tool developed by the authors was proposed. Two types of burnishing process experiments were conducted using the tip-burnishing process to deburr the workpiece edge and create a sharp cutting edge. Furthermore, an evaluation test for the cutting performance of the sharp edge, which was treated using the developed burnishing process, was conducted. In the deburring experiment, superior deburring was achieved by generating a sliding effect orthogonal to the burr generation direction. An experiment was conducted for evaluating the sharpening of the cutting edge; it was observed that the cutting-edge angle decreased due to the burnishing process. A cutting performance test was conducted using a wedge-shaped workpiece before and after burnishing. The cutting performance of the workpiece was quantitatively evaluated based on the load and stroke required for the cutting of the sheet material.
{"title":"Edge Treatment by Tip-Burnishing Process with an Active Rotary Tool","authors":"Masato Okada, Seito Yoshita, M. Nikawa, Naho Hasegawa","doi":"10.4028/p-h2VUhA","DOIUrl":"https://doi.org/10.4028/p-h2VUhA","url":null,"abstract":"A novel edge treatment method that utilizes a tip-burnishing process with an active rotary tool developed by the authors was proposed. Two types of burnishing process experiments were conducted using the tip-burnishing process to deburr the workpiece edge and create a sharp cutting edge. Furthermore, an evaluation test for the cutting performance of the sharp edge, which was treated using the developed burnishing process, was conducted. In the deburring experiment, superior deburring was achieved by generating a sliding effect orthogonal to the burr generation direction. An experiment was conducted for evaluating the sharpening of the cutting edge; it was observed that the cutting-edge angle decreased due to the burnishing process. A cutting performance test was conducted using a wedge-shaped workpiece before and after burnishing. The cutting performance of the workpiece was quantitatively evaluated based on the load and stroke required for the cutting of the sheet material.","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"123 36","pages":"33 - 40"},"PeriodicalIF":0.0,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138953712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abdul Rahim Safaruddin, U. A. Salim, S. Suyitno, M. Mahardika, B. Arifvianto
Electropolishing has been widely used for surface finishing of metallic products in the industry, owing to its excellent capability of producing metallic components with a homogeneously smooth surfaces. However, this treatment is often constrained by the long duration required for the processing. Therefore, an improvement in this process is needed. The aim of this research is to introduce the use of electropolishing with circulated electrolytes for improving the surface finish of brass. In this work, electropolishing was carried out by using circulated H2SO4 electrolyte for 10 to 30 min in a customized electropolishing chamber. The effect of this treatment on surface morphology, surface roughness, and thickness reduction of the brass specimen was determined. The results showed a better capability of electropolishing with circulated electrolyte in decreasing the brass roughness, i.e., by 84%, than that without electrolyte circulation which only reached 45% during 30 min of the treatment.
{"title":"Electropolishing with Circulated Electrolyte for Improving Surface Finish of Brass","authors":"Abdul Rahim Safaruddin, U. A. Salim, S. Suyitno, M. Mahardika, B. Arifvianto","doi":"10.4028/p-q7tTGU","DOIUrl":"https://doi.org/10.4028/p-q7tTGU","url":null,"abstract":"Electropolishing has been widely used for surface finishing of metallic products in the industry, owing to its excellent capability of producing metallic components with a homogeneously smooth surfaces. However, this treatment is often constrained by the long duration required for the processing. Therefore, an improvement in this process is needed. The aim of this research is to introduce the use of electropolishing with circulated electrolytes for improving the surface finish of brass. In this work, electropolishing was carried out by using circulated H2SO4 electrolyte for 10 to 30 min in a customized electropolishing chamber. The effect of this treatment on surface morphology, surface roughness, and thickness reduction of the brass specimen was determined. The results showed a better capability of electropolishing with circulated electrolyte in decreasing the brass roughness, i.e., by 84%, than that without electrolyte circulation which only reached 45% during 30 min of the treatment.","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"111 9","pages":"41 - 48"},"PeriodicalIF":0.0,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138954053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Takeru Sakamoto, N. Yamauchi, Takumu Takase, Mone Kimura, K. Gonda, Y. Kobayashi
In this study, we proposed a method for fabricating diagnostic imaging nanoparticles composed of Au nanoparticles and silica shells (Au/SiO2). The proposed method consisted of two steps. The first step was the synthesis of Au nanoparticles. In sodium hydroxide (NaOH) solution, hydrogen tetrachloroaurate (III) trihydrate was reduced with tetrakis(hydroxymethyl)phosphonium chloride to synthesize Au nanoparticles with a diameter of 1.7 ± 0.3 nm. The Au nanoparticles were then coated with silica in the following step. The silica coating was achieved via a sol–gel reaction of tetraethyl orthosilicate in the presence of Au nanoparticles in water/ethanol dissolved in NaOH. The Au/SiO2 nanoparticles degraded faster in saline or phosphate-buffered saline than in water, and the X-ray imaging capability was retained.
在这项研究中，我们提出了一种由金纳米粒子和二氧化硅外壳（Au/SiO2）组成的诊断成像纳米粒子的制造方法。该方法包括两个步骤。第一步是合成金纳米粒子。在氢氧化钠（NaOH）溶液中，用四（羟甲基）氯化磷还原三水四氯金酸氢（III），合成直径为 1.7 ± 0.3 nm 的金纳米粒子。在接下来的步骤中，金纳米颗粒被涂覆上二氧化硅。二氧化硅涂层是通过原硅酸四乙酯与纳米金颗粒在溶有 NaOH 的水/乙醇中的溶胶-凝胶反应实现的。金/二氧化硅纳米粒子在生理盐水或磷酸盐缓冲盐水中的降解速度快于在水中的降解速度，但其 X 射线成像能力得以保留。
{"title":"Synthesis of Single Nanometer-Sized Au Nanoparticles Coated with Silica Toward X-Ray Contrast Agent","authors":"Takeru Sakamoto, N. Yamauchi, Takumu Takase, Mone Kimura, K. Gonda, Y. Kobayashi","doi":"10.4028/p-5lOBa0","DOIUrl":"https://doi.org/10.4028/p-5lOBa0","url":null,"abstract":"In this study, we proposed a method for fabricating diagnostic imaging nanoparticles composed of Au nanoparticles and silica shells (Au/SiO2). The proposed method consisted of two steps. The first step was the synthesis of Au nanoparticles. In sodium hydroxide (NaOH) solution, hydrogen tetrachloroaurate (III) trihydrate was reduced with tetrakis(hydroxymethyl)phosphonium chloride to synthesize Au nanoparticles with a diameter of 1.7 ± 0.3 nm. The Au nanoparticles were then coated with silica in the following step. The silica coating was achieved via a sol–gel reaction of tetraethyl orthosilicate in the presence of Au nanoparticles in water/ethanol dissolved in NaOH. The Au/SiO2 nanoparticles degraded faster in saline or phosphate-buffered saline than in water, and the X-ray imaging capability was retained.","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"110 26","pages":"119 - 128"},"PeriodicalIF":0.0,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138954084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yi Cheng Chen, Hideaki Tsukamoto, Yuyuan Zhao, A. D. Pramata
{"title":"Special Nanomaterials and Surface Treatment","authors":"Yi Cheng Chen, Hideaki Tsukamoto, Yuyuan Zhao, A. D. Pramata","doi":"10.4028/b-wpa4ww","DOIUrl":"https://doi.org/10.4028/b-wpa4ww","url":null,"abstract":"","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"16 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138955947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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