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Showing results 12840 to 12859 of 67421
  • 171(1976-6)_p66-72.pdf.jpg
  • Article


  • Authors: Gôlman, LI (1976)

  • Những quan điểm của F-Ăng-ghen đối với quá trình nhận thức lịch sử và đối với các đặc điêm của khoa học lịch sử đều cho thấy rằng người chỉ đạo vĩ đại của nền khoa học lịch sử Mác-xit là F. Ăng-ghen đã có một sự chú ý, đặc biêt đối với những vấn đề phương pháp luận và Người đã góp phần cống hiến to lớn vào việc nghiên cứu khoa học những vấn đề đó.

  • 170(1976-5)_p55-65.pdf.jpg
  • Article


  • Authors: Gôlman, L.I. (1976)

  • Quan điểm của chủ nghĩa Mác-Lenin, phép biện chứng là công cụ lô-gic chủ yếu của nhận thức lịch sử. Không nên hạn chế những phương tiện loogic của viêc nghiên cứu chỉ ở những cái bắt nguồn từ những quy luật cơ bản của phép biện chứng và không nên loại bỏ tất cả những thủ pháp nghiên cứu khác, trong đó có thủ pháp logic hình thức. Bản thân tính chất phức tạp của quá trình lịch sử, sự khác nhau muôn màu muôn vẻ của các biểu hiện của các quy luật biện chứng, không cho phép vận dụng của một cách tầm thường phương pháp khoa học mà đòi hỏi phải có một quan điểm toàn diện đối với việc nghiên cứu các hiện tượng lịch sử, phải sử dụng rộng rãi kho công cụ nghiên cứu hỗ trợ.

  • Fabrication-and-characterization-of-PZT-string-based-MEMS-devices_2016_Journal-of-Science-Advanced-Materials-and-Devices.pdf.jpg
  • Article


  • Authors: D.T. Huong Giang; N.H. Duc; G. Agnus; T. Maroutian; P. Lecoeur (2016)

  • String based MEMS devices recently attract world technology development thanks to their advantages over cantilever ones. Approaching to this direction, the paper reports on the micro-fabrication and characterization of free-standing doubly clamped piezoelectric beams based on heterostructures of Pd/ FeNi/Pd/PZT/LSMO/STO/Si. The displacement of strings is investigated in both static and dynamic mode. The static response exhibits a bending displacement as large as 1.2 am, whereas the dynamic response shows a strong resonance with a high quality factor of around 35 depending on the resonant mode at atmospheric pressure. These findings are comparable with those observed in large dim...

  • 00051000401.pdf.jpg
  • Theses


  • Authors: Vũ Minh Thông;  Advisor: Pham, Tien Thanh ; Nguyen, Hoang Luong (2019)

  • The Metal – Insulator – Metal (MIM) nanocups structure on glass substrate and in water were fabricated by chemical method and sputtering, studied by transmittance properties. The morphology of the sample was studied by Scanning Electron Microscope, and transmittance properties were studies by UV-Vis-NIR, and simulated by Finite Difference Time Domain (FDTD) method. The result showed that MIM nanocups have surface plasmon resonance (SPR) and localize surface plasmon resonance (LSPR) phenomena, that depend on size of Polystyrene (PS) and thickness of metal and insulator layers. The purpose of this thesis is: Deposit monolayer PS nanoparticles on glass substrate ; Fabrication MIM ...

  • 01050000335.pdf.jpg
  • Thesis


  • Authors: Nguyen, Thi Khanh Van;  Advisor: Ta, Dinh Canh (2011)

  • Tổng quan lý thuyết về pin mặt trời truyền thống và đặc biệt là về pin mặt trời sử dụng chất màu. Giới thiệu về vật liệu bán dẫn ZnO và một số nghiên cứu đã có về cấu trúc vùng năng lượng và tính chất quang. Trình bày các phương pháp kĩ thuật được sử dụng để chế tạo và khảo sát tính chất, hình thái học, cấu trúc của màng nano ZnO. Phân tích và khảo sát các kết quả thu được từ các phép đo phổ nhiễu xạ tia X (XRD), ảnh hiển vi điện tử truyền qua (SEM), phổ hấp thụ và truyền qua (UV-vis) và phổ huỳnh quang. Từ đó rút ra khẳng định về việc chế tạo thành công màng nano ZnO. Cuối cùng là phần kết luận và tài liệu tham khảo.

  • Fabrication-of-lithium-substituted-copper-ferrite-_2018_Journal-of-Science--.pdf.jpg
  • Article


  • Authors: Manikandan, V.; Singh, Monika; Yadav, B.C.; Denardin, Juliano C. (2018)

  • A Li-CuFe2O4thinfilm has a well-defined nanocrystalline structure with a crystallite size of ~17 nm. The TEM and SEM images of the Li-CuFe2O4thinfilm show a polyhedron shape of nanoparticles with uneven sizes, resulting in a significant change in its gas sensing characteristics such as sensitivity and sensor response. An optical analysis shows that the Li-CuFe2O4thinfilm has a semiconducting nature, and the band gap of the thinfilm is determined to be 1.15 eV. The gas sensor analysis demonstrates repeatability of the sensing behavior of the Li-CuFe2O4 thin film and this ensures a reliable and efficient gas sensor at room temperature.

  • 456.pdf.jpg
  • Article


  • Authors: Dao, Quang-Duy (2020)

  • We demonstrate an efficient bulk heterojunction (BHJ) organic solar cell (OSCs) utilizing a soluble phthalocyanine derivative, 1,4,8,11,15,18,22,25-octahexylphthalocyanine (C6PcH2), and a fullerene derivative, 1-(3-methoxy-carbonyl)-propyl-1-1-phenyl-(6,6)C71 and roles of processing additive solvent on improvement of the BHJ OSCs. By adding processing additive solvent, filling factor and short-circuit current density are improved to 0.57 and 8.6 mA/cm2, respectively. As a result, the power conversion efficiency of 3.6% is achieved. Otherwise, the effects of processing additive solvent are demonstrated by taking the absorption and photoluminescence spectra of C6PcH2 and composite thin ...

  • 725.pdf.jpg
  • Article


  • Authors: Nong, Thi Hien Hương (2020)

  • In language testing and assessment, face validity of a test is used by learners and is probably considered as the most commonly discussed type of test validity because it is primarily dealt with the question of whether a test measures what it is said to measure. Therefore, this study investigates students’ and English lecturers’ perceptions toward the Institutional English Test based on the Common European Framework of Reference administered in a public university in Vietnam. A survey of 103 students and 20 English lecturers from the Institutional Program was conducted. A questionnaire with 7 main concerns – weightage, time allocation, language skills, topics, question items, instruct...

  • 23-Nguyễn Thị Ngọc Lan, Nguyễn Thị Lan Hương.pdf.jpg
  • Article


  • Authors: Nguyễn, Thị Ngọc Lan; Nguyễn, Thị Lan Hương (2017)

  • Bài viết giới thiệu các tính năng của mạng xã hội Facebook với các đặc tính đáp ứng những yêu cầu của hoạt động thông tin thư viện, giúp người cung cấp thông tin và người dùng tin kết nối nhanh chóng

  • FaceVoicesAndLivesExperiencesOfADirectorInBuilding.pdf.jpg
  • Book


  • Authors: Nguyen, Van Huy; Bodemer, Margaret Barnhill (2008)

  • Part one of the book includes twelve papers which were presented in international conferences and workshops at different times and places, and as such, it has been impossible to avoid some overlap ininformation. The second part consists of twelve essays written by oveseas colleagues who have contributed and collaborated with us in the in the process of establishing and sustaining the development of VME. In these essays, they share their experiences and perspectives.

  • 4242-97-8273-1-10-20180320.pdf.jpg
  • Article


  • Authors: Nguyen, Xuan Sang; Luu, Thi Lan Anh; Tran, Thanh Thai; Phan, Trung Nghia; Vo, Thach Son (2018)

  • Polypyrrole (PPy) nanocomposites reinforced with zinc oxide (ZnO) nanorod and nano flower were fabricated by chemical oxidative polymerization method using an ammonium per-sulphate (APS, (NH4)2S2O8) as an oxidizing agent. The polymer nanocomposite were characterized by X-ray diffractometer (XRD), scanning electron microscopy (SEM), and Fourier transform infrared (FTIR). The results were compared with pure as-prepared PPy. The SEM images of the nanocomposites show homogeneous dispersion characteristics and different morphologies of ZnO structures such as rod and flower-like shapes. In the FTIR spectra, composite samples showed characteristic peaks of PPy shifted to higher positions co...

  • Facile-combustion-based-engineering-of-novel-white-light-emitting-Zn2TiO4-Dy3-nanophosphors-for-display-and-forensic-applications_2017_Journal-of-Scie.pdf.jpg
  • Article


  • Authors: Girish, K.M.; Prashantha, S.C.; Nagabhushana, H. (2017)

  • Nanomaterialsfind a wide range of applications in surface based nanoscience and technology. To pass high backward encumbrance, low sensitivity, complicated setup and poor universality in traditional methods for the enhancement of latentfingerprints and display applications, we explored the super-structures of dysprosium (Dy3+) doped Zn2TiO4via a facile solution combustion route. This method offers new potentials in surface-based science comprising display, latentfingerprint, and luminescent ink for anticounterfeiting applications. The characteristic emissions of intra-4f shell Dy3+ cations in blue, yellow and red regions corresponding to 4F9/2 to 6H15/2, 6H13/2, and 6H11/2transitions ...

  • Facile fabrication, characterization and efficient photocatalytic activity of surfactant free ZnS, CdS and CuS nanoparticles.pdf.jpg
  • Article


  • Authors: Ayodhya, Dasari; Veerabhadram, Guttena (2019)

  • In this research, some metal sulfide nanoparticles (NPs) including ZnS, CdS and CuS NPs were prepared by a simple and low-cost co-precipitation method for the photocatalytic degradation of Bromothymol blue dye (BTB) under natural sunlight irradiation. The synthesized materials were characterized by XRD, FT-IR, UV-vis DRS, PL, TGA, SEM and TEM techniques for the investigation of structural, electronic, thermal, and morphological properties. The optical absorption and the band gaps of the ZnS, CdS, and CuS NPs were calculated as 3.62 eV, 2.21 eV, and 1.16 eV from the UV-vis DRS. XRD results demonstrate the cubic structure of ZnS NPs, CdS NPs, and the hexagonal structure of CuS NPs in th...

  • Facile sol-gel synthesis and enhanced photocatalytic activity of the V2O5-ZnO nanoflakes.pdf.jpg
  • Article


  • Authors: Shukla, Prakhar; Shukla, Jitendra Kumar (2019)

  • The structural, optical and photocatalytic properties of V2O5-ZnO nanoflakes are reported. A facile sol-gel method was employed for the synthesis of ZnO and V2O5-ZnO nanostructures. Structural characterizations revealed a flake-type structure of V2O5-ZnO obtained from ZnO nanorods. A decrease in the band gap from 3.28 eV for ZnO to 2.64 eV for V2O5-ZnO was observed by Ultraviolet (UV)-Visible spectroscopy. The V2O5-ZnO based photodegradation of methylene blue (MB) dye indicated that the anchoring of V2O5 in the ZnO composite improved the photocatalytic efficiency of the composite under irradiation of the visible light

  • 1-s2.0-S2468217918301527-main.pdf.jpg
  • Article


  • Authors: Shukla, Prakhar; Shukla, Jitendra Kumar (2018)

  • The structural, optical and photocatalytic properties of V2O5-ZnO nanoflakes are reported. A facile sol-gel method was employed for the synthesis of ZnO and V2O5-ZnO nanostructures. Structural characteriza-tions revealed aflake-type structure of V2O5-ZnO obtained from ZnO nanorods. A decrease in the band gap from 3.28 eV for ZnO to 2.64 eV for V2O5-ZnO was observed by Ultraviolet (UV)-Visible spectroscopy. The V2O5-ZnO based photodegradation of methylene blue (MB) dye indicated that the anchoring of V2O5 in the ZnO composite improved the photocatalytic efficiency of the composite under irradiation of the visible light

  • Facile solvothermal synthesis and functionalization of polyethylene glycol-coated paramagnetic Gd2(CO3)3 particles and corresponding Gd2O3 nanoparticles for use as MRI contrast agents.pdf.jpg
  • Article


  • Authors: Dougherty, Atika; Nasution, Erika L.Y.; Iskandar, Ferry; Dougherty, Geoff (2019)

  • Paramagnetic particles and nanoparticles have been widely used in bioimaging and biomedical applications. In this paper, functionalized gadolinium carbonate (Gd2(CO3)3) particles with polyethylene glycol (PEG) for use as an MRI contrast agent were produced. These PEGylated particles were also used as a single precursor for synthesizing Gd2O3 nanoparticles by a novel calcination pathway. The morphological, chemical, and structural properties of both the PEGylated Gd2(CO3)3 particles and Gd2O3 nanoparticles were examined using a scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR), and energy dispersive X-ray spectroscopy (EDS) techniques. After...

Browsing by Title

Jump to: 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
or enter first few letters:  
Showing results 12840 to 12859 of 67421
  • 171(1976-6)_p66-72.pdf.jpg
  • Article


  • Authors: Gôlman, LI (1976)

  • Những quan điểm của F-Ăng-ghen đối với quá trình nhận thức lịch sử và đối với các đặc điêm của khoa học lịch sử đều cho thấy rằng người chỉ đạo vĩ đại của nền khoa học lịch sử Mác-xit là F. Ăng-ghen đã có một sự chú ý, đặc biêt đối với những vấn đề phương pháp luận và Người đã góp phần cống hiến to lớn vào việc nghiên cứu khoa học những vấn đề đó.

  • 170(1976-5)_p55-65.pdf.jpg
  • Article


  • Authors: Gôlman, L.I. (1976)

  • Quan điểm của chủ nghĩa Mác-Lenin, phép biện chứng là công cụ lô-gic chủ yếu của nhận thức lịch sử. Không nên hạn chế những phương tiện loogic của viêc nghiên cứu chỉ ở những cái bắt nguồn từ những quy luật cơ bản của phép biện chứng và không nên loại bỏ tất cả những thủ pháp nghiên cứu khác, trong đó có thủ pháp logic hình thức. Bản thân tính chất phức tạp của quá trình lịch sử, sự khác nhau muôn màu muôn vẻ của các biểu hiện của các quy luật biện chứng, không cho phép vận dụng của một cách tầm thường phương pháp khoa học mà đòi hỏi phải có một quan điểm toàn diện đối với việc nghiên cứu các hiện tượng lịch sử, phải sử dụng rộng rãi kho công cụ nghiên cứu hỗ trợ.

  • Fabrication-and-characterization-of-PZT-string-based-MEMS-devices_2016_Journal-of-Science-Advanced-Materials-and-Devices.pdf.jpg
  • Article


  • Authors: D.T. Huong Giang; N.H. Duc; G. Agnus; T. Maroutian; P. Lecoeur (2016)

  • String based MEMS devices recently attract world technology development thanks to their advantages over cantilever ones. Approaching to this direction, the paper reports on the micro-fabrication and characterization of free-standing doubly clamped piezoelectric beams based on heterostructures of Pd/ FeNi/Pd/PZT/LSMO/STO/Si. The displacement of strings is investigated in both static and dynamic mode. The static response exhibits a bending displacement as large as 1.2 am, whereas the dynamic response shows a strong resonance with a high quality factor of around 35 depending on the resonant mode at atmospheric pressure. These findings are comparable with those observed in large dim...

  • 00051000401.pdf.jpg
  • Theses


  • Authors: Vũ Minh Thông;  Advisor: Pham, Tien Thanh ; Nguyen, Hoang Luong (2019)

  • The Metal – Insulator – Metal (MIM) nanocups structure on glass substrate and in water were fabricated by chemical method and sputtering, studied by transmittance properties. The morphology of the sample was studied by Scanning Electron Microscope, and transmittance properties were studies by UV-Vis-NIR, and simulated by Finite Difference Time Domain (FDTD) method. The result showed that MIM nanocups have surface plasmon resonance (SPR) and localize surface plasmon resonance (LSPR) phenomena, that depend on size of Polystyrene (PS) and thickness of metal and insulator layers. The purpose of this thesis is: Deposit monolayer PS nanoparticles on glass substrate ; Fabrication MIM ...

  • 01050000335.pdf.jpg
  • Thesis


  • Authors: Nguyen, Thi Khanh Van;  Advisor: Ta, Dinh Canh (2011)

  • Tổng quan lý thuyết về pin mặt trời truyền thống và đặc biệt là về pin mặt trời sử dụng chất màu. Giới thiệu về vật liệu bán dẫn ZnO và một số nghiên cứu đã có về cấu trúc vùng năng lượng và tính chất quang. Trình bày các phương pháp kĩ thuật được sử dụng để chế tạo và khảo sát tính chất, hình thái học, cấu trúc của màng nano ZnO. Phân tích và khảo sát các kết quả thu được từ các phép đo phổ nhiễu xạ tia X (XRD), ảnh hiển vi điện tử truyền qua (SEM), phổ hấp thụ và truyền qua (UV-vis) và phổ huỳnh quang. Từ đó rút ra khẳng định về việc chế tạo thành công màng nano ZnO. Cuối cùng là phần kết luận và tài liệu tham khảo.

  • Fabrication-of-lithium-substituted-copper-ferrite-_2018_Journal-of-Science--.pdf.jpg
  • Article


  • Authors: Manikandan, V.; Singh, Monika; Yadav, B.C.; Denardin, Juliano C. (2018)

  • A Li-CuFe2O4thinfilm has a well-defined nanocrystalline structure with a crystallite size of ~17 nm. The TEM and SEM images of the Li-CuFe2O4thinfilm show a polyhedron shape of nanoparticles with uneven sizes, resulting in a significant change in its gas sensing characteristics such as sensitivity and sensor response. An optical analysis shows that the Li-CuFe2O4thinfilm has a semiconducting nature, and the band gap of the thinfilm is determined to be 1.15 eV. The gas sensor analysis demonstrates repeatability of the sensing behavior of the Li-CuFe2O4 thin film and this ensures a reliable and efficient gas sensor at room temperature.

  • 456.pdf.jpg
  • Article


  • Authors: Dao, Quang-Duy (2020)

  • We demonstrate an efficient bulk heterojunction (BHJ) organic solar cell (OSCs) utilizing a soluble phthalocyanine derivative, 1,4,8,11,15,18,22,25-octahexylphthalocyanine (C6PcH2), and a fullerene derivative, 1-(3-methoxy-carbonyl)-propyl-1-1-phenyl-(6,6)C71 and roles of processing additive solvent on improvement of the BHJ OSCs. By adding processing additive solvent, filling factor and short-circuit current density are improved to 0.57 and 8.6 mA/cm2, respectively. As a result, the power conversion efficiency of 3.6% is achieved. Otherwise, the effects of processing additive solvent are demonstrated by taking the absorption and photoluminescence spectra of C6PcH2 and composite thin ...

  • 725.pdf.jpg
  • Article


  • Authors: Nong, Thi Hien Hương (2020)

  • In language testing and assessment, face validity of a test is used by learners and is probably considered as the most commonly discussed type of test validity because it is primarily dealt with the question of whether a test measures what it is said to measure. Therefore, this study investigates students’ and English lecturers’ perceptions toward the Institutional English Test based on the Common European Framework of Reference administered in a public university in Vietnam. A survey of 103 students and 20 English lecturers from the Institutional Program was conducted. A questionnaire with 7 main concerns – weightage, time allocation, language skills, topics, question items, instruct...

  • 23-Nguyễn Thị Ngọc Lan, Nguyễn Thị Lan Hương.pdf.jpg
  • Article


  • Authors: Nguyễn, Thị Ngọc Lan; Nguyễn, Thị Lan Hương (2017)

  • Bài viết giới thiệu các tính năng của mạng xã hội Facebook với các đặc tính đáp ứng những yêu cầu của hoạt động thông tin thư viện, giúp người cung cấp thông tin và người dùng tin kết nối nhanh chóng

  • FaceVoicesAndLivesExperiencesOfADirectorInBuilding.pdf.jpg
  • Book


  • Authors: Nguyen, Van Huy; Bodemer, Margaret Barnhill (2008)

  • Part one of the book includes twelve papers which were presented in international conferences and workshops at different times and places, and as such, it has been impossible to avoid some overlap ininformation. The second part consists of twelve essays written by oveseas colleagues who have contributed and collaborated with us in the in the process of establishing and sustaining the development of VME. In these essays, they share their experiences and perspectives.

  • 4242-97-8273-1-10-20180320.pdf.jpg
  • Article


  • Authors: Nguyen, Xuan Sang; Luu, Thi Lan Anh; Tran, Thanh Thai; Phan, Trung Nghia; Vo, Thach Son (2018)

  • Polypyrrole (PPy) nanocomposites reinforced with zinc oxide (ZnO) nanorod and nano flower were fabricated by chemical oxidative polymerization method using an ammonium per-sulphate (APS, (NH4)2S2O8) as an oxidizing agent. The polymer nanocomposite were characterized by X-ray diffractometer (XRD), scanning electron microscopy (SEM), and Fourier transform infrared (FTIR). The results were compared with pure as-prepared PPy. The SEM images of the nanocomposites show homogeneous dispersion characteristics and different morphologies of ZnO structures such as rod and flower-like shapes. In the FTIR spectra, composite samples showed characteristic peaks of PPy shifted to higher positions co...

  • Facile-combustion-based-engineering-of-novel-white-light-emitting-Zn2TiO4-Dy3-nanophosphors-for-display-and-forensic-applications_2017_Journal-of-Scie.pdf.jpg
  • Article


  • Authors: Girish, K.M.; Prashantha, S.C.; Nagabhushana, H. (2017)

  • Nanomaterialsfind a wide range of applications in surface based nanoscience and technology. To pass high backward encumbrance, low sensitivity, complicated setup and poor universality in traditional methods for the enhancement of latentfingerprints and display applications, we explored the super-structures of dysprosium (Dy3+) doped Zn2TiO4via a facile solution combustion route. This method offers new potentials in surface-based science comprising display, latentfingerprint, and luminescent ink for anticounterfeiting applications. The characteristic emissions of intra-4f shell Dy3+ cations in blue, yellow and red regions corresponding to 4F9/2 to 6H15/2, 6H13/2, and 6H11/2transitions ...

  • Facile fabrication, characterization and efficient photocatalytic activity of surfactant free ZnS, CdS and CuS nanoparticles.pdf.jpg
  • Article


  • Authors: Ayodhya, Dasari; Veerabhadram, Guttena (2019)

  • In this research, some metal sulfide nanoparticles (NPs) including ZnS, CdS and CuS NPs were prepared by a simple and low-cost co-precipitation method for the photocatalytic degradation of Bromothymol blue dye (BTB) under natural sunlight irradiation. The synthesized materials were characterized by XRD, FT-IR, UV-vis DRS, PL, TGA, SEM and TEM techniques for the investigation of structural, electronic, thermal, and morphological properties. The optical absorption and the band gaps of the ZnS, CdS, and CuS NPs were calculated as 3.62 eV, 2.21 eV, and 1.16 eV from the UV-vis DRS. XRD results demonstrate the cubic structure of ZnS NPs, CdS NPs, and the hexagonal structure of CuS NPs in th...

  • Facile sol-gel synthesis and enhanced photocatalytic activity of the V2O5-ZnO nanoflakes.pdf.jpg
  • Article


  • Authors: Shukla, Prakhar; Shukla, Jitendra Kumar (2019)

  • The structural, optical and photocatalytic properties of V2O5-ZnO nanoflakes are reported. A facile sol-gel method was employed for the synthesis of ZnO and V2O5-ZnO nanostructures. Structural characterizations revealed a flake-type structure of V2O5-ZnO obtained from ZnO nanorods. A decrease in the band gap from 3.28 eV for ZnO to 2.64 eV for V2O5-ZnO was observed by Ultraviolet (UV)-Visible spectroscopy. The V2O5-ZnO based photodegradation of methylene blue (MB) dye indicated that the anchoring of V2O5 in the ZnO composite improved the photocatalytic efficiency of the composite under irradiation of the visible light

  • 1-s2.0-S2468217918301527-main.pdf.jpg
  • Article


  • Authors: Shukla, Prakhar; Shukla, Jitendra Kumar (2018)

  • The structural, optical and photocatalytic properties of V2O5-ZnO nanoflakes are reported. A facile sol-gel method was employed for the synthesis of ZnO and V2O5-ZnO nanostructures. Structural characteriza-tions revealed aflake-type structure of V2O5-ZnO obtained from ZnO nanorods. A decrease in the band gap from 3.28 eV for ZnO to 2.64 eV for V2O5-ZnO was observed by Ultraviolet (UV)-Visible spectroscopy. The V2O5-ZnO based photodegradation of methylene blue (MB) dye indicated that the anchoring of V2O5 in the ZnO composite improved the photocatalytic efficiency of the composite under irradiation of the visible light

  • Facile solvothermal synthesis and functionalization of polyethylene glycol-coated paramagnetic Gd2(CO3)3 particles and corresponding Gd2O3 nanoparticles for use as MRI contrast agents.pdf.jpg
  • Article


  • Authors: Dougherty, Atika; Nasution, Erika L.Y.; Iskandar, Ferry; Dougherty, Geoff (2019)

  • Paramagnetic particles and nanoparticles have been widely used in bioimaging and biomedical applications. In this paper, functionalized gadolinium carbonate (Gd2(CO3)3) particles with polyethylene glycol (PEG) for use as an MRI contrast agent were produced. These PEGylated particles were also used as a single precursor for synthesizing Gd2O3 nanoparticles by a novel calcination pathway. The morphological, chemical, and structural properties of both the PEGylated Gd2(CO3)3 particles and Gd2O3 nanoparticles were examined using a scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR), and energy dispersive X-ray spectroscopy (EDS) techniques. After...