Advances in Natural Sciences: Nanoscience and Nanotechnology最新文献

Fe3O4/CoFe2O4 core-shell nanoparticles with enhanced magnetic properties for hyperthermia application 具有增强磁性能的 Fe3O4/CoFe2O4 核壳纳米粒子在热疗中的应用

Advances in Natural Sciences: Nanoscience and Nanotechnology Pub Date : 2024-04-25 DOI: 10.1088/2043-6262/ad3ddb

V. T. K. Oanh, L. H. Nguyen, L. Phong, M. T. T. Trang, H. P. Thu, N. X. Truong, N. X. Ca, P. H. Nam, D. H. Manh

{"title":"Fe3O4/CoFe2O4 core-shell nanoparticles with enhanced magnetic properties for hyperthermia application","authors":"V. T. K. Oanh, L. H. Nguyen, L. Phong, M. T. T. Trang, H. P. Thu, N. X. Truong, N. X. Ca, P. H. Nam, D. H. Manh","doi":"10.1088/2043-6262/ad3ddb","DOIUrl":"https://doi.org/10.1088/2043-6262/ad3ddb","url":null,"abstract":"\u0000 Fe3O4/CoFe2O4 core/shell nanoparticles with varying shell thickness were fabricated by seed-mediated growth via thermal decomposition method. Ligand exchange process using poly(maleic anhydride-alt-1-octadecene) (PMAO) was performed to prepare the aqueous magnetic fluids from the as-synthesised nanoparticles. X-ray diffraction (XRD), transmission electron microscopy (TEM) and Quantum Design PPMS VersaLab were utilised to characterise morphological and magnetic properties of the sample. XRD results showed that all the particles were single phase with spinel structure and the average crystallite size in the range of 11–17 nm. All particles were spherical in TEM images with similar size compared to results calculated from XRD. Magnetic measurements were performed at different temperatures (50 − 300 K) at 30 kOe. The result showed that the saturation magnetisation (M\u0000 s) and coercivity (H\u0000 C) were significantly increased with the formation of hard magnetic shell with varying thickness. The dynamic light scattering (DLS) analysis presented a narrow distribution and zeta potential of −16 to −35 mV, indicating a good stability of the ferrofluids. The cytotoxicity of the FOC3/PMAO ferrofluid, which has the highest SAR value of 372.02 W g−1, was tested on Hep-G2 cell line at different concentrations from 10 to 100 μg ml−1. Less than 30% of the cell was inhibited, indicating that the FOC3/PMAO particles have low toxicity at these tested concentrations. Thus, these as-synthesised core/shell nanoparticles with uniform particle size, high saturation magnetisation, good stability and five-time increased specific absorption rate (SAR) compared to the Fe3O4 core nanoparticles are very promising in hyperthermia and magnetic resonance imaging (MRI) applications.","PeriodicalId":56371,"journal":{"name":"Advances in Natural Sciences: Nanoscience and Nanotechnology","volume":"40 22","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140656994","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}

引用次数: 0

Effect of biosynthesised silver nanoparticles as sterilant on physiological and biochemical characteristics in micropropagation of Musa sapientum L. 生物合成银纳米粒子作为灭菌剂对无花果树微繁殖生理生化特性的影响

Advances in Natural Sciences: Nanoscience and Nanotechnology Pub Date : 2024-04-24 DOI: 10.1088/2043-6262/ad3b7d

Siriporn Phongtongpasuk, Thitikamon Liamnimit, Thanyaporn Buakaew, Manthita Homsuwan, Suppanuch Khamphong, N. Yongvanich

{"title":"Effect of biosynthesised silver nanoparticles as sterilant on physiological and biochemical characteristics in micropropagation of Musa sapientum L.","authors":"Siriporn Phongtongpasuk, Thitikamon Liamnimit, Thanyaporn Buakaew, Manthita Homsuwan, Suppanuch Khamphong, N. Yongvanich","doi":"10.1088/2043-6262/ad3b7d","DOIUrl":"https://doi.org/10.1088/2043-6262/ad3b7d","url":null,"abstract":"\u0000 Green synthesis of silver nanoparticles (AgNPs) using fruit peel extract has gained considerable interest, as it is an eco-friendly and cost-effective method. However, studies on the use of biosynthesised AgNPs to sterilise plant tissue culture medium as an alternative to autoclaving are limited. Thus, this study presented a biogenic method for synthesising AgNPs using mangosteen peel extract. The biosynthesised AgNPs were characterised by different spectroscopic and microscopic methods, including UV-visible spectroscopy (UV-vis), Fourier transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy, and energy dispersive x-ray spectroscopy. The results showed that the phytochemical constituents in the mangosteen peel extract (MPE) helped to reduce Ag+ from AgNO3 to metallic silver (Ag0) and stabilise the particles. The formation of biogenic AgNPs was monitored by UV-vis demonstrating a characteristic peak at 425 nm. The AgNPs were spherical and crystalline. The size distribution of the biogenic AgNPs was 5–47 nm with an average diameter of 23.1 ± 6.8 nm. To evaluate the potential of the AgNPs for use as an alternative method to sterilise the culture medium, the antimicrobial activity of the biosynthesised AgNPs (0.1, 1, 10, 100, and 1000 mg l−1) was tested in the banana culture medium. The most feasible concentration of AgNPs to decontaminate the culture medium was 100 mg l−1. Moreover, the results demonstrated that adding 100 mg l−1 AgNPs to the culture medium promoted the growth of the plantlets without any toxic effects. Thus, biogenic AgNPs are a potential biocide to sterilise in vitro banana culture medium.","PeriodicalId":56371,"journal":{"name":"Advances in Natural Sciences: Nanoscience and Nanotechnology","volume":"50 22","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140662877","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}

引用次数: 0

Palladium/coconut husk biochar composite material as an effective electrocatalyst for ethanol oxidation reaction 钯/椰壳生物炭复合材料作为乙醇氧化反应的有效电催化剂

Advances in Natural Sciences: Nanoscience and Nanotechnology Pub Date : 2024-04-24 DOI: 10.1088/2043-6262/ad3de0

Mary Elyssa R Rañoa, Matthew L. Villanueva, J. R. Laxamana, H. G. G. Necesito, B. J. Tongol

{"title":"Palladium/coconut husk biochar composite material as an effective electrocatalyst for ethanol oxidation reaction","authors":"Mary Elyssa R Rañoa, Matthew L. Villanueva, J. R. Laxamana, H. G. G. Necesito, B. J. Tongol","doi":"10.1088/2043-6262/ad3de0","DOIUrl":"https://doi.org/10.1088/2043-6262/ad3de0","url":null,"abstract":"\u0000 This study utilised coconut husk biochar as an alternative sustainable carbon support for Pd-based electrocatalyst for ethanol oxidation reaction in basic medium. Coconut husk biochar (BC) was prepared via slow pyrolysis at 800 °C for 1 h at a ramp rate of 5 °C min−1. The Pd/BC catalyst was prepared via borohydride-facilitated reduction of palladium chloride solution. TEM analysis revealed good dispersion of the Pd nanoparticles on the biochar support with particle size ranging from 1.9 to 3.4 nm. Cyclic voltammetry (CV) measurements of Pd/BC in 1.0 M ethanol in 0.1 M KOH gave an on-set potential of −0.615 V (versus Ag/AgCl) with a forward peak current density of 23.87 mA cm−2, which is slightly higher than the commercial Pd/C catalyst. The Pd/BC also has a higher electrochemical stability and durability than the commercial Pd/C catalyst based on chronoamperometry studies (i.e., 44.43% versus 39.64% current retention). The synthesised coconut husk biochar–supported Pd catalyst exhibited promising results for ethanol oxidation reaction for alkaline direct ethanol fuel cell application.","PeriodicalId":56371,"journal":{"name":"Advances in Natural Sciences: Nanoscience and Nanotechnology","volume":"50 21","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140660818","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}

引用次数: 0

Facile synthesis of co-axially electrospun Co-C nanofibers and their ferromagnetic behavior 同轴电纺 Co-C 纳米纤维的简易合成及其铁磁行为

Advances in Natural Sciences: Nanoscience and Nanotechnology Pub Date : 2024-04-23 DOI: 10.1088/2043-6262/ad3ddf

Pujashree Priyadarshini Sethy, B. Sundaray

{"title":"Facile synthesis of co-axially electrospun Co-C nanofibers and their ferromagnetic behavior","authors":"Pujashree Priyadarshini Sethy, B. Sundaray","doi":"10.1088/2043-6262/ad3ddf","DOIUrl":"https://doi.org/10.1088/2043-6262/ad3ddf","url":null,"abstract":"\u0000 We describe a simple co-axial electrospinning approach followed by a carbonisation process to create cobalt-carbon (Co-C) nanofibers that are then thoroughly analysed using various techniques. X-ray diffraction measurements showed the creation of pure crystalline cobalt with face-centered cubic (fcc) structure, and average crystallite size was determined using the Debye–Scherrer formula. The average crystallite size has been calculated to be in the range of 10 − 15 nm. According to the Raman investigation, all Co-C nanofibers have an amorphous carbon structure with little graphitic behaviour. Field emission scanning electron microscopy was used to determine the shape and average diameter of electrospun nanofibers. The field-dependent magnetic characterisation demonstrated a satisfactory ferromagnetic behaviour with maximum saturation magnetisation values of 10, 10.2, and 11.2 emu/g for Co12.5-C sample at 300, 100, and 5 K, respectively. Compared to bulk cobalt, the produced Co-C nanofibers have a high coercivity value. With average crystallite size, the coercivity varies. Again, magnetisation versus temperature measurements have supported the existence of ferromagnetism because there is no evidence of blocking temperature or any transitional behaviour below 300 K. As a result, applications for microwave absorption, catalysis, and several magnetic recording devices can benefit from the coupling of ferromagnetic properties with carbon nanofiber materials.","PeriodicalId":56371,"journal":{"name":"Advances in Natural Sciences: Nanoscience and Nanotechnology","volume":"75 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140670635","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}

引用次数: 0

Advancement of magnetic particle imaging in diagnosis and therapy 磁粉成像在诊断和治疗中的应用进展

Advances in Natural Sciences: Nanoscience and Nanotechnology Pub Date : 2024-04-22 DOI: 10.1088/2043-6262/ad3b7a

Karthick Harini, K. Girigoswami, P. Pallavi, Pemula Gowtham, Alex Daniel Prabhu, A. Girigoswami

{"title":"Advancement of magnetic particle imaging in diagnosis and therapy","authors":"Karthick Harini, K. Girigoswami, P. Pallavi, Pemula Gowtham, Alex Daniel Prabhu, A. Girigoswami","doi":"10.1088/2043-6262/ad3b7a","DOIUrl":"https://doi.org/10.1088/2043-6262/ad3b7a","url":null,"abstract":"\u0000 Magnetic particle imaging (MPI) has gained significant traction as an ionising radiation-free tomographic method that offers real-time imaging capabilities with enhanced sensitivity and resolutions. In this technique, magnetic nanoparticles (MNPs) are employed, particularly iron oxide nanoparticles with superparamagnetic nature, as probes within the MPI system. These MNPs enable the tracking and precise quantification of particle movement with minimal background noise. The 3D location and concentration of MNPs can provide better insights for multiple applications in vascular imaging, cell tracking, cancer cell imaging, inflammation, implant monitoring, and trauma imaging and can thus accelerate the diagnosis of disorders. The mononuclear phagocyte system provides a significant advantage, as they are involved in the spontaneous clearance of the tracers used in MPI, which readily minimise the toxic effects. Several studies have demonstrated that MPI-based functional neuroimaging is superior to other imaging modalities, providing adequate temporal resolution images with quick scan intervals. In MPI, nanoparticles are solely responsible for the source and visualisation, unlike magnetic resonance imaging (MRI), where nanoparticles were used only as supportive tracers. This review provides an overview of the principle, diagnostic, and therapeutic applications of MPI as well as the advantages and challenges MPI has over other diagnostic imaging methods in modern clinical setups.","PeriodicalId":56371,"journal":{"name":"Advances in Natural Sciences: Nanoscience and Nanotechnology","volume":"23 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140674732","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}

引用次数: 0

New insights into the role of nanotechnology in Bifidobacterium biomedical applications 纳米技术在双歧杆菌生物医学应用中的作用新见解

Advances in Natural Sciences: Nanoscience and Nanotechnology Pub Date : 2024-04-22 DOI: 10.1088/2043-6262/ad3b7c

Ghazal Ghaznavi, Samaneh Hashemi, Mohammad Mahdi Abolhosseini, Parisa Vosough, Parvin Lohrasbi, Saeed Taghizadeh, Amir Savardashtaki

{"title":"New insights into the role of nanotechnology in Bifidobacterium biomedical applications","authors":"Ghazal Ghaznavi, Samaneh Hashemi, Mohammad Mahdi Abolhosseini, Parisa Vosough, Parvin Lohrasbi, Saeed Taghizadeh, Amir Savardashtaki","doi":"10.1088/2043-6262/ad3b7c","DOIUrl":"https://doi.org/10.1088/2043-6262/ad3b7c","url":null,"abstract":"\u0000 The human gastrointestinal tract is colonised by a multifaceted and dynamic population of microorganisms consisting of trillions of microbes called the gut microbiota. Through extensive research using animal models and human studies, the significant contributions of gut microbiota to immune and metabolic balance, protection against pathogens, and even neurobehavioural traits have been established. Members of the genus Bifidobacterium are the first bacteria to colonise the intestinal tract in infants, and now it has been proven that they play a positive role in enhancing the host immunity, nutrient absorption, reducing and treating gastrointestinal infections, as well as improving conditions such as diarrhea, constipation, and eczema. Bacterial nanotechnology is a rapidly growing research area with great potential for improvement and the discovery of innovations in new applications of bacteria such as Bifidobacterium. In this review, we provide an up-to-date summary of the relations of nanotechnology with Bifidobacterium in various fields, including bacterial synthesis of nanoparticles, encapsulation of bacteria, bacterial toxicity of nanomaterial, application in the field of cancer targeting, and also the treatment of other diseases such as Alzheimer’s and IBD.","PeriodicalId":56371,"journal":{"name":"Advances in Natural Sciences: Nanoscience and Nanotechnology","volume":"36 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140672977","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}

引用次数: 0

Synthesis of ZnO nanorods decorating with Ag nanoparticles on flexible polyimide substrate for visible photodetector application 在柔性聚酰亚胺基底上合成银纳米颗粒装饰的氧化锌纳米棒，用于可见光光电探测器

Advances in Natural Sciences: Nanoscience and Nanotechnology Pub Date : 2024-04-22 DOI: 10.1088/2043-6262/ad3ddc

Bui Gia Man Nguyen, Ha Ngoc Duy Huynh, Nhat Minh Nguyen, Phan Phuong Ha La, Le Thai Duy, V. Dang

引用次数: 0

Enhanced formic acid electro-oxidation reaction over Ir,N-doped TiO2-supported Pt nanocatalyst 在掺杂 Ir、N 的 TiO2-supported Pt 纳米催化剂上增强甲酸电氧化反应

Advances in Natural Sciences: Nanoscience and Nanotechnology Pub Date : 2024-03-01 DOI: 10.1088/2043-6262/ad2c7d

T. Huynh, Quyen Huynh, Ngoc-Han T Huynh, Hau Quoc Pham

{"title":"Enhanced formic acid electro-oxidation reaction over Ir,N-doped TiO2-supported Pt nanocatalyst","authors":"T. Huynh, Quyen Huynh, Ngoc-Han T Huynh, Hau Quoc Pham","doi":"10.1088/2043-6262/ad2c7d","DOIUrl":"https://doi.org/10.1088/2043-6262/ad2c7d","url":null,"abstract":"\u0000 In this work, we prepared an Ir,N-doped TiO2 nanomaterial via a facile HNO3-assisted hydrothermal process that was used as an advanced support for nano-sized Pt nanoparticles (NPs) for the formic acid oxidation reaction (FAOR). The physical and electrochemical behaviours of the as-made Pt/Ir,N-doped TiO2 catalyst were systemically investigated through X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), field emission scanning electron microscopes coupled with energy dispersive X-ray analysis (FE-SEM/EDX mapping), transmission electron microscopy (TEM), linear sweep voltammetry (LSV), Tafel slope, CO-stripping, and chronoamperometric (CA) test. The Pt NPs (ca. 3 nm) were anchored on the Ir,N-doped TiO2 support, being formed by a mixture of rutile and brookite with a particle size of several ten nanometers. Due to the small size and uniform distribution of Pt NPs, the Pt/Ir,N-doped TiO2 catalyst had an electrochemical surface area of 79.88 m2 g−1, which was greater than that of the commercial Pt/C (77.63 m2 g−1). In terms of the FAOR, the Pt/Ir,N-doped TiO2 catalyst showed a negative FAOR onset potential, high current density (11.85 mA cm−2), and superior CO-tolerance compared to the commercially available catalyst. Also, the as-made catalyst possessed high electrochemical durability after 3600 s for testing. The enhanced FAOR efficiency was assigned to the formation of a dual-doping effect and strong interplay between Pt and TiO2-based support, which not only improved the electron transfer but also weakened the adsorption of carbonaceous species, thereby boosting the reaction kinetics. This study could open up a facile but effective strategy to promote particular electrochemical applications.","PeriodicalId":56371,"journal":{"name":"Advances in Natural Sciences: Nanoscience and Nanotechnology","volume":"22 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140083683","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}

引用次数: 0

Facile preparation of KNN thin film with high purity phase and excellent electrical properties 轻松制备具有高纯度相和优异电气性能的 KNN 薄膜

Advances in Natural Sciences: Nanoscience and Nanotechnology Pub Date : 2024-03-01 DOI: 10.1088/2043-6262/ad2fb6

Phuong T M Nguyen, Tai Nguyen, Thu-Hien Vu

{"title":"Facile preparation of KNN thin film with high purity phase and excellent electrical properties","authors":"Phuong T M Nguyen, Tai Nguyen, Thu-Hien Vu","doi":"10.1088/2043-6262/ad2fb6","DOIUrl":"https://doi.org/10.1088/2043-6262/ad2fb6","url":null,"abstract":"\u0000 Obtaining high purity alkali niobate (K\u0000 x\u0000 Na1-x\u0000 NbO3) thin films without secondary phase on metal coated traditional silicon (Si) substrates via sol–gel technique has remained great challenges until now. Herein, we report K0.5Na0.5NbO3 (KNN) thin films successfully deposited on Pt/Ti/SiO2/Si(100) substrates by a simply effective sol–gel process. A comprehensive and systematic investigation of processing conditions on the microstructures and electrical properties of spin-coated KNN films was presented. We have found that phase purity and microstructures of KNN films are strongly influenced by content of alkali excess and the annealing temperature. Thin films with an equal excess amount of 10% mol K and Na (KNN1) sintered at 650 °C show high crystallinity with a preferred (100)-orientation degree of 78%, and homogeneous and dense surface with columnar structure and large grain size up to 254 nm. The result of quantitative XPS analysis has proved that the composition of the film is close to the chemical stoichiometry. As a consequence, the obtained KNN1 films exhibit a large dielectric constant of 775 and low dielectric loss of ∼2% in the wide frequency range from 1kHz up to 10MHz as well as the best shape of P−E loops. Furthermore, leakage current density of the film is about 9.45 × 10−5 A cm−2 at E ≈100 kV cm−1.","PeriodicalId":56371,"journal":{"name":"Advances in Natural Sciences: Nanoscience and Nanotechnology","volume":"46 17","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140279894","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}

引用次数: 0

Comparison study between two different precursors of RGO/AuNPs one pot synthesis RGO/AuNPs 一锅合成法两种不同前体的比较研究

Advances in Natural Sciences: Nanoscience and Nanotechnology Pub Date : 2024-03-01 DOI: 10.1088/2043-6262/ad2dc7

Nurul Farhana Abu Kasim, N. A. Halim, K. K. Ong, S. Demon

{"title":"Comparison study between two different precursors of RGO/AuNPs one pot synthesis","authors":"Nurul Farhana Abu Kasim, N. A. Halim, K. K. Ong, S. Demon","doi":"10.1088/2043-6262/ad2dc7","DOIUrl":"https://doi.org/10.1088/2043-6262/ad2dc7","url":null,"abstract":"\u0000 One pot synthesis of graphene nanocomposites is low-cost and time-efficient methodology to be considered for large scale device fabrication. Graphene precursors made of renewable and waste materials such as rice husk, oil palm kernel and sugar are explored upon rising concern of expensiveness and hazard in conventional approaches. This paper presents chemical characterisation study of one pot reduced graphene oxide/gold nanoparticles (RGO/AuNPs) synthesised from low-cost sucrose as precursor and dehydroascorbic acid as green reducing agent at ambient condition which was originally used by Hurtado et al in 2020. Raman spectrum of RGO/AuNPs was compared to composite of commercial GO precursor to evaluate quality of reduction products. Result from UV–vis spectroscopy, Fourier-transform infrared spectroscopy (FTIR) and x-ray photoelectron spectroscopy (XPS) showed that both techniques successfully eliminated oxygen-containing functional groups to form graphene constitution. Asides from lower stability, AuNPs in sucrose-derived RGO possessed larger size and was more dispersed than those of GO-derived RGO, implying the need to optimise the current recipe. Reduction mechanism of both precursors was proposed for better understanding. The aim of this work is to show feasibility of green graphene nanocomposite synthesis that could empower productivity of electronic, optical and optoelectronics applications.","PeriodicalId":56371,"journal":{"name":"Advances in Natural Sciences: Nanoscience and Nanotechnology","volume":"79 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140280803","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}

引用次数: 0