Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Nanoparticles (4)
- Superhydrophobicity (3)
- Drug delivery (2)
- Graphene (2)
- Light trapping (2)
-
- Nanostructures (2)
- Photovoltaics (2)
- Aluminum nanorods (1)
- Anti-icing (1)
- Anti-icing Coatings (1)
- Antimicrobial (1)
- Biomedical research (1)
- Breast cancer cells (1)
- Broad spectrum (1)
- CVD (1)
- Cancer Therapy (1)
- Cancer cells (1)
- Cancer nanomedicine (1)
- Cancer research (1)
- Cancer therapy (1)
- Carbon nanotubes (1)
- Chalcogenides (1)
- Colloids (1)
- Combination therapy (1)
- Cytotoxicity (1)
- Drugs (1)
- Electrochemical and thermal process (1)
- FDTD modeling (1)
- GLAD Technique (1)
- Glancing angle deposition (1)
- Publication
- Publication Type
Articles 1 - 14 of 14
Full-Text Articles in Nanotechnology
Photophysical Properties Of Tunable Dox-Ir820 Chemo-Ptt Combination Nanomedicine, Eshaal Nadeem, Fatima Abbas, Noureen Siraj
Photophysical Properties Of Tunable Dox-Ir820 Chemo-Ptt Combination Nanomedicine, Eshaal Nadeem, Fatima Abbas, Noureen Siraj
Research and Creative Works Expo
Cancer remains the second leading cause of death in the United States, underscoring the urgent need for more effective treatment options. Nanotechnology offers innovative solutions through combination nanomedicines that can integrate multiple therapeutic mechanisms into a single platform. In this study, we developed aqueous nanoparticles (NPs) composed of a combined chemotherapeutic agent and photothermal therapy drug,[DOX][IR820], using a simple reprecipitation method. By adjusting different parameters, we tuned NP size and evaluated how this influenced their photophysical behavior, such as absorbance and fluorescence emission, and photothermal therapeutic activity such as light-to-heat conversion efficiency. These properties were analyzed to identify the optimal …
Antibacterial Tellurium Dioxide Nanoparticles Incorporated Into An Adhesive Wound Dressing, Tina Hesabizadeh, Rajendra Subedi, Rolando Baez, Thomas J. Webster, Gregory Guisbiers
Antibacterial Tellurium Dioxide Nanoparticles Incorporated Into An Adhesive Wound Dressing, Tina Hesabizadeh, Rajendra Subedi, Rolando Baez, Thomas J. Webster, Gregory Guisbiers
Faculty Scholarship
Tellurium dioxide (TeO2) nanoparticles were synthesized by pulsed laser ablation in liquids (PLAL) using a bottom-ablation configuration, with deionized water as the solvent and pure tellurium pellets as the target. The resulting nanoparticles were spherical, with an average diameter of 56 ± 13 nm. Phase analysis indicated that the nanoparticles consisted mainly of around 83% of paratellurite α-TeO2, with a minor fraction, i.e., around 17% of the metastable γ-TeO2 phase. The antibacterial performance of the TeO2 nanoparticles was evaluated against Escherichia coli, Pseudomonas aeruginosa, Staphylococcus epidermidis, and methicillin-resistant Staphylococcus aureus (MRSA), demonstrating broad-spectrum antibacterial activity at concentrations as low as …
Modelling Physico-Chemical Properties Of Binary Nano-Alloys By Nano-Thermodynamics And Machine Learning, Luke David Geoffrion
Modelling Physico-Chemical Properties Of Binary Nano-Alloys By Nano-Thermodynamics And Machine Learning, Luke David Geoffrion
Theses and Dissertations
Nanoscience and nanotechnology are some of the fastest growing fields of materials science that have given impact to several fields of science including biology, medicine, and catalysis. These applications take advantage of several properties of nanoscale materials that are present at sizes below 100 nm namely the increased surface to volume ratio. From a theoretical point of view, nanoscience research is dominated by Density Functional Theory and Molecular Dynamics. These techniques dominate for good reason, but are not without their own limitations due to their computational complexity which results in very long calculation time to complete on materials whose size …
Facile Fabrication Of Superhydrophobic And Superolephilic Materials For Effective Oil Absorbtion And Oil-Water Separation, Ali Tawfeeq Abdulhussein
Facile Fabrication Of Superhydrophobic And Superolephilic Materials For Effective Oil Absorbtion And Oil-Water Separation, Ali Tawfeeq Abdulhussein
Theses and Dissertations
Surfaces that have a water contact angle (WCA) above 150° and a negligible difference between the receding and advancing contact angles are superhydrophobic, meaning that a simple, minimal tilt will cause water droplets to roll off the surfaces. Superhydrophobic surfaces are found in nature and can possess several fascinating properties, including the ability to self-clean. A typical superhydrophobic surface has micro/nanostructure roughness and low surface energy, which combine to give it its unusual anti-wetting properties. Because of their unique capabilities, superhydrophobic surfaces have interested scientists in research and industry fields for years. In recent decades, researchers have developed a number …
Photochromic Thermochromic Nanocomposite, Syed M. Mustafa Akailvi
Photochromic Thermochromic Nanocomposite, Syed M. Mustafa Akailvi
Theses and Dissertations
We have proposed a new nanocomposite consisting of F-127 polymer, AuNR and thermochromic dyes (TCD) which change color when they are heated above a tunable transition temperature. This nanocomposite has been demonstrated to show rapid, reversible and easily detectable color change at the timescales of ~60ms without degradation of any of its constituents which makes it a good candidate for in-vitro and in-vivo studies of thermal ablation treatment for cancer. This nanocomposite makes it possible to overcome one of the major shortcomings of photothermal therapy (PTT) and plasmonic photothermal therapy (PPTT) by allowing the detection of heating occurring during PPTT …
Multifunctional Nanosystems For Targeting And Treating Cancer Cells, Vijayalakshmi Dantuluri
Multifunctional Nanosystems For Targeting And Treating Cancer Cells, Vijayalakshmi Dantuluri
Theses and Dissertations
In the United States, breast cancer is one of the most frequently occurring and deadly cancers. Though various therapies have seen success, they have numerous negative side effects. The incorporation of nanomaterials with anticancer drugs could help avoid these side effects and enhance the drugs’ effects. Nanomaterials have many properties, such as size, shape, structure, morphology, and surface features, that can be precisely tuned by altering their chemical composition. In this work, we explored the use of graphene and gold nanorods to enhance drug localization in and destruction of cancer cells by targeted delivery of the drugs doxorubicin (Dox) and …
Synthesis Of Graphitic Nanostructures On Noble Metals, Amelie Adele Parmentier
Synthesis Of Graphitic Nanostructures On Noble Metals, Amelie Adele Parmentier
Theses and Dissertations
In this research, two subjects are studied: the growth of graphene from various catalysts with RF-CVD and the growth of graphitic nanostructures from gold-decorated graphene with RF-CVD. In the first topic, various catalysts are made with magnesium oxide and metal nanoparticles: iron, silver and gold. Using a radio-frequency generator, these catalysts are heated and placed in contact with three gases (argon, hydrogen and methane). By controlling various parameters, graphene synthesis can happen. The results are analyzed with Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), Thermo-gravimetrical analysis (TGA), and X-ray diffraction (XRD). In the second topic, commercial graphene is functionalized …
Glad Nanostructured Arrays With Enhanced Carrier Collection And Light Trapping For Photoconductive And Photovoltaic Device Applications, Hilal Cansizoglu
Glad Nanostructured Arrays With Enhanced Carrier Collection And Light Trapping For Photoconductive And Photovoltaic Device Applications, Hilal Cansizoglu
Theses and Dissertations
Solar energy harvesting has been of great interest for researchers over the past 50 years. Main emphasis has been on developing high quality materials with low defect density and proper band gaps. However, high cost of bulk materials and insufficient light absorption in thin films led to utilization of semiconductor nanostructures in photovoltaics and photonics. Light trapping abilities of nanostructures can provide high optical absorption whereas core/shell nanostructured arrays can allow enhanced charge carrier collection. However, most of the nanofabrication methods that can produce uniform nanostructure geometries are limited in materials, dimensions, and not compatible with industrial production systems. Therefore, …
Enhanced Light Trapping By Metallic Nanorod Arrays For Organic Photovoltaic Cells, Rosure Borhanalden Abdulrahman
Enhanced Light Trapping By Metallic Nanorod Arrays For Organic Photovoltaic Cells, Rosure Borhanalden Abdulrahman
Theses and Dissertations
Metallic nanostructures can exhibit different optical properties compared to bulk materials mainly depending on their shape, size, and separation. Vertically aligned arrays of aluminum (Al) nanorods of different lengths and morphologies were fabricated by DC sputtering using the glancing angle deposition (GLAD) method. Detailed structural and optical properties of GLAD Al nanorod were investigated and compared to those of conventional flat Al thin film coatings. Optical characterization results show that total reflectance is inversely proportional to nanorod length in the wavelength range 200-1800 nm, due to the enhanced surface plasmon resonance and light trapping among the nanorods. In addition, we …
Study Of Surface Modification Of Tungsten Nanostructures For Superhydrophobic Applications, Richard Alletru
Study Of Surface Modification Of Tungsten Nanostructures For Superhydrophobic Applications, Richard Alletru
Theses and Dissertations
In this work, we studied the impact of the modification of the structure of tungsten surfaces through physical vapor deposition (magnetron sputtering), electrochemical (anodization and electropolishing), and thermal (annealing) processes on the wettability of the designed surfaces. We observed static contact angle values ranging from around 10° to above 150° showing the importance of the techniques used to produce the surfaces. We noticed that the annealing process tends to increase the wettability, transforming hydrophobic surfaces into hydrophilic surfaces. We also observed that electropolishing affects the wettability in such a way that the contact angles of pre-chemically treated tungsten foils tend …
Nano-Biomedical Approaches Of Cancer Therapy Using Carbon Based And Magnetic Nanomaterials, Alokita Karmakar
Nano-Biomedical Approaches Of Cancer Therapy Using Carbon Based And Magnetic Nanomaterials, Alokita Karmakar
Theses and Dissertations
Since the inception of nanoparticles, they have affected almost each and every field of modern science and technology both in terms of research and application. Due to its subcellular level size and ease of modification for biological and medical purposes, nanoparticles have contributed greatly in various field of biomedical reaserch including cancer research. In this dissertation, emphasis has been given on an important area of research of a multi-modal anticancer therapeutic approach using carbon-based and magnetic inorganic nanoparticles. Cancer is a complex disease that has been known to be generated by mutations at the genetic level, and continue to accumulate …
Cytotoxicity Study Of Iron Oxide Nanoparticles, Single-Wall Carbon Nanotubes And Their Complexes Applied To Mcf7 Breast Cancer Cells, Karine Mege
Theses and Dissertations
Reactive Oxygen Species (ROS) are radicals of great concern to biologists. Their role in several diseases--such as neurodegenerative disease, diabetes, premature aging and cancer--has been intensively investigated during the last decade. Since a major focus in cancer research is to better understand how it is induced and therefore how it can be cured, the study of the cytotoxic effects of ROS production within cancer cells is vital. Nanotechnology is an emerging field of science that promises great improvements in a number of disciplines. Nano medicine is one of its daughter fields. Various nanomaterials are used for diagnosis and disease detection, …
Superhydrophobic Nanostructured Coating For Anti-Icing Applications, Khedir R. Khedir
Superhydrophobic Nanostructured Coating For Anti-Icing Applications, Khedir R. Khedir
Theses and Dissertations
In this work, anti-icing superhydrophobic (SHP) tungsten nanorod (WNR) surfaces were fabricated. The fabrication of WNR surfaces as rough surfaces was carried out using the Glancing Angle Deposition (GLAD) technique. Using the magnetron- sputtering deposition method, the deposition Ar pressure, Ar flow rate, and substrate tilting angle were varied to fabricate WNRs with different surface morphologies and porosities. The surface energy of the WNR films was lowered by coating them with a nano-layer (10-15nm) of Teflon AF2400 using an effusion cell. Static contact angle (SCA) measurements of the sessile water droplet gently dispensed on surfaces were used to characterize the …
Investigation Of Advanced Nanostructured Multijunction Photoanodes For Enhanced Solar Hydrogen Generation Via Water Splitting, Hidetaka Ishihara
Investigation Of Advanced Nanostructured Multijunction Photoanodes For Enhanced Solar Hydrogen Generation Via Water Splitting, Hidetaka Ishihara
Theses and Dissertations
As the worldwide demand for fossil-based fuel increases every day and the fossil reserve continues to be depleted, the need for alternative/renewable energy sources has gained momentum. Electric, hybrid, and hydrogen cars have been at the center of discussion lately among consumers, automobile manufacturers, and politicians, alike. The development of a fuel-cell based engine using hydrogen has been an ambitious research area over the last few decades-ever since Fujishima showed that hydrogen can be generated via the solar-energy driven photo-electrolytic splitting of water. Such solar cells are known as Photo-Electro-Chemical (PEC) solar cells. In order to commercialize this technology, various …