Selective synthesis of copper microsheets and ultralong microwires via a surfactant assisted hydrothermal process

Dehghanpour, Saeed; Mahmoudi, Ali; Shadpour, Sasan

doi:10.1134/s107036321505028x

Cited by 5 publications

(2 citation statements)

References 34 publications

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“…The strong signal of C at ∼0.2 keV is probably due to the support grid or existence of organic traces of CTAB remaining or the traces of cyclohexane (used for dispersing UCNPs) persisting in the sample even after drying under an IR lamp due to the sticky nature of UCNPs (Supporting Information, Figure S2). The percentage elemental composition is also found to be in correlation with the UCNPs in the present studies (Supporting Information, Table S1).…”

Section: Resultssupporting

confidence: 74%

Mesoporous Silica-Coated Upconversion Nanoparticles Assisted Photodynamic Therapy Using 5-Aminolevulinic Acid: Mechanistic andIn VivoStudies

Sharma

Dubey

Kumar

et al. 2022

ACS Appl. Bio Mater.

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Exclusively red-emitting upconversion nanoparticles (UCNPs) with the composition NaErF4:0.5%Tm as a core and NaYF4 as a shell were synthesized for performing photodynamic therapy (PDT). A possible mechanism was proposed for core–shell UCNPs formation. For loading a maximum amount of 5-aminolevulinic acid (5-ALA), mesoporous silica coating was performed on UCNPs. Studies under dark conditions confirmed the biocompatibility of 5-ALA-loaded UCNPs formulation (UCNPs-5-ALA) with MCF-7 cells. Meanwhile, studies under light-exposed conditions exhibited effective cytotoxicity against MCF-7 cells. Studies employing D2O-based cell cultured media and addition of DABCO in cell culture established that the cell death was due to oxidation of cellular components by reactive oxygen species (ROS) triggering the apoptosis. The formation of ROS was confirmed by DCF(H)DA-based ROS analysis via fluorescence microscopy to demonstrate the ROS production, which mediates the programmed cell death. Additionally, we have validated the apoptosis in MCF-7 cells with flow cytometry analyses. This was further confirmed by an electrophoretic mobility shift assay on nuclear extract and measurement of mitochondrial membrane potential. In the case of animal model studies, the formulation UCNPs-5-ALA without irradiation (980 nm) did not possess any in vivo cytotoxicity on tumor-induced SCID mice and there was a minimum migration of UCNPs-5-ALA to the vital organs but maximum retention at the tumor site only. Meanwhile, only the mice treated with UCNPs-5-ALA and irradiated on the tumor region with 980 nm laser (500 mW) for 20 min possessed a tumor with a size reduced to about 75% as compared with the corresponding control groups. To the best of our knowledge, this type of study was conducted for the first time employing exclusively red-emitting phosphors for effective PDT.

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Section: Resultssupporting

confidence: 74%

Mesoporous Silica-Coated Upconversion Nanoparticles Assisted Photodynamic Therapy Using 5-Aminolevulinic Acid: Mechanistic andIn VivoStudies

Sharma

Dubey

Kumar

et al. 2022

ACS Appl. Bio Mater.

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“…Among bottom-up methods, hydrothermal and solvothermal methods are used to synthesize metal 2D nanosheets. Dang et al (2014) and Dehghanpour et al (2015) employed the hydrothermal method to produce Cu nanosheets using polyvinylpyrrolidone (PVP) and cetyltrimethylammonium bromide (CTAB), respectively, as surface capping agent [13,16]. Hou et al (2013) and Duan et al (2014) presented the synthesis of rhodium (Rh) nanosheets by the solvothermal method in the presence of surfactants and the absence of surfactants, respectively [17,18].…”

Section: Introductionmentioning

confidence: 99%

The Green Synthesis of 2D Copper Nanosheets and Their Light Absorption

et al. 2021

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In this study, a new green synthesis method for two-dimensional (2D) copper nanosheets is developed using methylsulfonylmethane (DMSO2). The chemical composition and light absorption of 2D copper nanosheets are also studied. A new green method is mainly to utilize DMSO2, which is environmentally friendly enough to be considered a food-grade chemical, unlike the conventional method using toxic chemicals, such as ammonia and hydrazine (N2H4). With a reducing agent, the aggregation of uncertain copper products was produced in the absence of DMSO2, while 2D copper nanosheets were formed in the presence of DMSO2. The optimum concentration of DMSO2 as a surfactant was determined to be 2 M, resulting in large surface areas with regular edges. FTIR spectrum confirmed C–H bonding from DMSO2 used to synthesize 2D copper nanosheets. The light absorption peak was revealed at 800 nm in the UV–vis spectrum. This proposed new green method not only has a simpler process than the conventional methods, such as hydrothermal method and chemical bath deposition, but also substitutes toxic chemicals with DMSO2. 2D copper nanosheets can be used for various applications, including conductive filler or ink in the flexible electronics and laser photonics fields.

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Colorimetric sensing of fatty acids in organic solvents using polydiacetylene-based nanocomposites

Kaewnukulkit,

Traiphol,

Traiphol

2024

Heliyon

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Selective synthesis of copper microsheets and ultralong microwires via a surfactant assisted hydrothermal process

Cited by 5 publications

References 34 publications

Mesoporous Silica-Coated Upconversion Nanoparticles Assisted Photodynamic Therapy Using 5-Aminolevulinic Acid: Mechanistic andIn VivoStudies

Mesoporous Silica-Coated Upconversion Nanoparticles Assisted Photodynamic Therapy Using 5-Aminolevulinic Acid: Mechanistic andIn VivoStudies

The Green Synthesis of 2D Copper Nanosheets and Their Light Absorption

Colorimetric sensing of fatty acids in organic solvents using polydiacetylene-based nanocomposites

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