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Browsing by Author Pham, Tien Thanh

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  • Thesis

  • Environmentally sustainable cellulose fibers-based aerogel photothermal material for solar-driven clean water

    • Authors: Nguyễn, Hoàng Giang;  Advisor: Pham, Tien Thanh (2022)

  • This thesis reports the fabrication of PVA composite cellulose-based aerogel from sugarcane bagasse for application in seawater solar desalination. Tannic acid and Fe3+ salts were mix into the suspension of cellulose in PVA solution to improve the material’s light absorption capacity. Then, the material was characterized by methods such as SEM, BET, FT-IR, XRD. The evaporation performance of the material was tested in both experiment and real conditions. The master thesis aims at: Fabricate Aerogel from sugarcane bagasse, PVA, tannic acid, Fe (III). Characterize the material’s properties using methods such as SEM image, BET, XRD, UV-VIS, FT-IR, contact angle etc. Investigate the mate...
  • item.jpg
  • Thesis

  • Micro-capillaries lotus fabric-based aerogel for high-efficiency solar steam evaporator and water purification

    • Authors: Lai Tuan Dung;  Advisor: Pham, Tien Thanh; Yoji, Shibutani (2023)

  • Chapter 1: Introduction of solar steam generation -- Chapter 2: Experiments. In this chapter, the focus is on the fabrication process of photothermal materials using lotus fiber, PVA, tannic acid, and FeCl3. These materials are utilized to construct solar steam generation systems specifically designed for seawater desalination purposes. The chapter provides detailed information and procedures regarding the fabrication process of the photothermal materials and their subsequent application in the construction of the solar steam generation systems for effective desalination of seawater. Chapter 3: Results and discussions. This chapter provides a detailed account of the fabrication proces...
  • item.jpg
  • Thesis

  • Scalable and flexible photothermal material based on bacterial cellulose for solar steam generation

    • Authors: Nguyen, Thi Kieu Trang;  Advisor: Pham, Tien Thanh (2021)

  • The group's previous studies on natural photothermal conversion materials such as pomelo, fingered citron or corn straw have shown positive results when applied to the water evaporation system. However, the above materials are difficult to adjust in size, so their application in nature is somewhat limited. BC is a material that is easily cultured and can be adjusted in size depending on time, temperature, and culture medium. The fabrication of SSG structures using bacterial cellulose (BC) to prepare photothermal materials is described in this thesis. An iron-tannic complex has chemically functionalized the natural porous content, providing good absorption in the solar field. Thermal i...
  • 00051000483.pdf.jpg
  • Thesis

  • Study of fabrication of PMMA microspheres for applications in large scale manufacturing

    • Authors: Hoàng, Minh Kiên;  Advisor: Nguyen, Tran Thuat; Pham, Tien Thanh (2020)

  • Monodispersed poly(methyl methacrylate) microspheres with the size from 5μm to 13μm were prepared by using a dispersion polymerization method.Three reaction containers with volume of 250 ml; 500 mland 2000 mlwere used to study the scalability of the fabrication process.In the case of 2000-mlreaction container, more than 80g of microspheres were synthesized with high efficiency, which could be utilized for the fabrication of more than 100m2of anisotropic conductive film. The products were proved to have a good quality and to be ready forcarrying forwardto the silver-plating process and the fabrication of anisotropic conductive films.Other two methods including microwave-assisted polyme...
  • 00051000372.pdf.jpg
  • Theses

  • Study of low refractive index homogeneous thin film for application on metamaterial

    • Authors: Phạm, Đình Đạt;  Advisor: Pham, Tien Thanh (2019)

  • In this study, my purpose is making a type of nano-composite material that has low index of refraction and low index of extinction. Based on the idea of hyperbolic metamaterial, it is able to create the low refractive index and low loss medium by the combination of low refractive index but loss material as metals and low loss but high refractive index as polymers. I fabricated the nanocomposite based on nano silver particles embedded on polymers. This type of material was considered in about absorption, high refractive index region, etc. In this study, I used calculation to orient and predict about object material and experiment to verify my prediction. The research contents include: ...
  • item.jpg
  • Thesis

  • Study of multipole excitation of plasmon resonance in metal nanostructure using optical vortices

    • Authors: Nguyen, Dang Quang Huy;  Advisor: Pham, Tien Thanh (2024)

  • Since 19th century, nanomaterial has been considered a promising material that can create a big jump in technology due to its special properties. The reason for the difference is based on the size effect of the material. With nanoscale size, the number of surface atoms increases significantly and takes a pivotal role in forming the material properties. Hence, the surface plasmon resonance effect becomes sig- nificantly strong in the nanomaterial. The plasmon effect was observed in the early 20th century by Prof Robert W. Wood and under research the following time. Up to now, Surface Plasmon Resonance (SPR) has been applied in many fields such as bio-detection, solar cells, and ...
  • 00051000370.pdf.jpg
  • Theses

  • Study of optical absorption of metamaterial based on nanostructures in nature

    • Authors: Đào, Trung Đức;  Advisor: Pham, Tien Thanh (2019)

  • Our research team found two suitable objects: Bauhinia purpurea and Pistia stratiotes for the aim of metamaterial fabrication. The nanostructures of these two leaf sheets are periodic. The thickness of the nanostructure layer on these two types of leaves is predicted from 80-100 nm. We also showed the ability to absorb light well when leaf samples are coated with copper metal with a thickness of 20-80 nm. Absorption capacity predicts about 90% of light entering the structure. A purple bauhinia leaf with about 30 nm copper layer has the best ability to absorb light while a water cabbage leaf needs about 40 nm of a copper-coated layer to achieve the best light absorption. After ...

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Browsing by Author Pham, Tien Thanh

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 1 to 7 of 7
  • item.jpg
  • Thesis

  • Environmentally sustainable cellulose fibers-based aerogel photothermal material for solar-driven clean water

    • Authors: Nguyễn, Hoàng Giang;  Advisor: Pham, Tien Thanh (2022)

  • This thesis reports the fabrication of PVA composite cellulose-based aerogel from sugarcane bagasse for application in seawater solar desalination. Tannic acid and Fe3+ salts were mix into the suspension of cellulose in PVA solution to improve the material’s light absorption capacity. Then, the material was characterized by methods such as SEM, BET, FT-IR, XRD. The evaporation performance of the material was tested in both experiment and real conditions. The master thesis aims at: Fabricate Aerogel from sugarcane bagasse, PVA, tannic acid, Fe (III). Characterize the material’s properties using methods such as SEM image, BET, XRD, UV-VIS, FT-IR, contact angle etc. Investigate the mate...
  • item.jpg
  • Thesis

  • Micro-capillaries lotus fabric-based aerogel for high-efficiency solar steam evaporator and water purification

    • Authors: Lai Tuan Dung;  Advisor: Pham, Tien Thanh; Yoji, Shibutani (2023)

  • Chapter 1: Introduction of solar steam generation -- Chapter 2: Experiments. In this chapter, the focus is on the fabrication process of photothermal materials using lotus fiber, PVA, tannic acid, and FeCl3. These materials are utilized to construct solar steam generation systems specifically designed for seawater desalination purposes. The chapter provides detailed information and procedures regarding the fabrication process of the photothermal materials and their subsequent application in the construction of the solar steam generation systems for effective desalination of seawater. Chapter 3: Results and discussions. This chapter provides a detailed account of the fabrication proces...
  • item.jpg
  • Thesis

  • Scalable and flexible photothermal material based on bacterial cellulose for solar steam generation

    • Authors: Nguyen, Thi Kieu Trang;  Advisor: Pham, Tien Thanh (2021)

  • The group's previous studies on natural photothermal conversion materials such as pomelo, fingered citron or corn straw have shown positive results when applied to the water evaporation system. However, the above materials are difficult to adjust in size, so their application in nature is somewhat limited. BC is a material that is easily cultured and can be adjusted in size depending on time, temperature, and culture medium. The fabrication of SSG structures using bacterial cellulose (BC) to prepare photothermal materials is described in this thesis. An iron-tannic complex has chemically functionalized the natural porous content, providing good absorption in the solar field. Thermal i...
  • 00051000483.pdf.jpg
  • Thesis

  • Study of fabrication of PMMA microspheres for applications in large scale manufacturing

    • Authors: Hoàng, Minh Kiên;  Advisor: Nguyen, Tran Thuat; Pham, Tien Thanh (2020)

  • Monodispersed poly(methyl methacrylate) microspheres with the size from 5μm to 13μm were prepared by using a dispersion polymerization method.Three reaction containers with volume of 250 ml; 500 mland 2000 mlwere used to study the scalability of the fabrication process.In the case of 2000-mlreaction container, more than 80g of microspheres were synthesized with high efficiency, which could be utilized for the fabrication of more than 100m2of anisotropic conductive film. The products were proved to have a good quality and to be ready forcarrying forwardto the silver-plating process and the fabrication of anisotropic conductive films.Other two methods including microwave-assisted polyme...
  • 00051000372.pdf.jpg
  • Theses

  • Study of low refractive index homogeneous thin film for application on metamaterial

    • Authors: Phạm, Đình Đạt;  Advisor: Pham, Tien Thanh (2019)

  • In this study, my purpose is making a type of nano-composite material that has low index of refraction and low index of extinction. Based on the idea of hyperbolic metamaterial, it is able to create the low refractive index and low loss medium by the combination of low refractive index but loss material as metals and low loss but high refractive index as polymers. I fabricated the nanocomposite based on nano silver particles embedded on polymers. This type of material was considered in about absorption, high refractive index region, etc. In this study, I used calculation to orient and predict about object material and experiment to verify my prediction. The research contents include: ...
  • item.jpg
  • Thesis

  • Study of multipole excitation of plasmon resonance in metal nanostructure using optical vortices

    • Authors: Nguyen, Dang Quang Huy;  Advisor: Pham, Tien Thanh (2024)

  • Since 19th century, nanomaterial has been considered a promising material that can create a big jump in technology due to its special properties. The reason for the difference is based on the size effect of the material. With nanoscale size, the number of surface atoms increases significantly and takes a pivotal role in forming the material properties. Hence, the surface plasmon resonance effect becomes sig- nificantly strong in the nanomaterial. The plasmon effect was observed in the early 20th century by Prof Robert W. Wood and under research the following time. Up to now, Surface Plasmon Resonance (SPR) has been applied in many fields such as bio-detection, solar cells, and ...
  • 00051000370.pdf.jpg
  • Theses

  • Study of optical absorption of metamaterial based on nanostructures in nature

    • Authors: Đào, Trung Đức;  Advisor: Pham, Tien Thanh (2019)

  • Our research team found two suitable objects: Bauhinia purpurea and Pistia stratiotes for the aim of metamaterial fabrication. The nanostructures of these two leaf sheets are periodic. The thickness of the nanostructure layer on these two types of leaves is predicted from 80-100 nm. We also showed the ability to absorb light well when leaf samples are coated with copper metal with a thickness of 20-80 nm. Absorption capacity predicts about 90% of light entering the structure. A purple bauhinia leaf with about 30 nm copper layer has the best ability to absorb light while a water cabbage leaf needs about 40 nm of a copper-coated layer to achieve the best light absorption. After ...