Microwave radiation-assisted covalent functionalization of boron nitride nanotubes and their grafting with cationic thermo and pH-sensitive hydrogel

Monteiro, Gabriel Augusto Alemão; Sousa, Ricardo Geraldo de; Silva, Wellington Marcos da; Gastelois, Pedro Lana; Macedo, W. A. A.; Sousa, Edésia Martins Barros de

doi:10.1007/s13204-020-01610-9

Cited by 4 publications

(3 citation statements)

References 67 publications

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“…When comparing Figure 8a,b with Figure 8c-f, particles with higher electron absorptions, appearing as darker sites isolated from each other, can be associated with the presence of an electron-conducting nanostructure, indicating the presence of metallic Cu [33]. It is expected that combining these metal nanostructures with BNNTs can improve the stability of the nanoparticles within the solution, allowing their application as theranostic nanomaterials.…”

Section: Resultsmentioning

confidence: 95%

“…After the synthesis of Cu nanoparticles, two new contributions were observed at 200.4 and 197.0 eV (Figure 5b); the first is attributed to Cl II and the second to the presence of metallic copper (Cu 0). In addition, the binding energies at 396.6 eV and 400.0 eV are attributed to B-N-B bonding [33] and O-B-N bonding [14], respectively. The O 1s spectra are also shown in Figure 5e,f.…”

Section: Resultsmentioning

confidence: 99%

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Potential Production of Theranostic Boron Nitride Nanotubes (64Cu-BNNTs) Radiolabeled by Neutron Capture

2021

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In this work, the radioisotope 64Cu was obtained from copper (II) chloride dihydrate in a nuclear research reactor by neutron capture, (63Cu(n,γ)64Cu), and incorporated into boron nitride nanotubes (BNNTs) using a solvothermal process. The produced 64Cu-BNNTs were analyzed by TEM, MEV, FTIR, XDR, XPS and gamma spectrometry, with which it was possible to observe the formation of64Cu nanoparticles, with sizes of up to 16 nm, distributed through nanotubes. The synthesized of 64Cu nanostructures showed a pure photoemission peak of 511 keV, which is characteristic of gamma radiation. This type of emission is desirable for Photon Emission Tomography (PET scan) image acquisition, as well as its use in several cancer treatments. Thus, 64Cu-BNNTs present an excellent alternative as theranostic nanomaterials that can be used in diagnosis and therapy by different techniques used in nuclear medicine.

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Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

Potential Production of Theranostic Boron Nitride Nanotubes (64Cu-BNNTs) Radiolabeled by Neutron Capture

2021

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“…Lesho et al, for example, described a swelling behavior with different pH values, due to the ratio of non-ionizable to ionizable groups of N,N-dimethylaminoethyl methacrylate (DMA) [ 19 ]. Another well-known pH-responsive monomer is the polybase-containing copolymer 2-(diethylamino)ethyl methacrylate (DEAEMA) with a pK a of 7.3 [ 20 , 21 , 22 ]. DEAEMA is a smart pH and thermo-responsive polymer with a unique performance upon pH changes.…”

Section: Introductionmentioning

confidence: 99%

Study on the Interaction of Plasma-Polymerized Hydrogel Coatings with Aqueous Solutions of Different pH

Levien

Nasri

Weltmann

et al. 2023

Gels

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Amphiphilic hydrogels from mixtures of 2-hydroxyethyl methacrylate and 2-(diethylamino)ethyl methacrylate p(HEMA-co-DEAEMA) with specific pH sensitivity and hydrophilic/hydrophobic structures were designed and polymerized via plasma polymerization. The behavior of plasma-polymerized (pp) hydrogels containing different ratios of pH-sensitive DEAEMA segments was investigated concerning possible applications in bioanalytics. In this regard, the morphological changes, permeability, and stability of the hydrogels immersed in solutions of different pHs were studied. The physico-chemical properties of the pp hydrogel coatings were analyzed using X-ray photoelectron spectroscopy, surface free energy measurements, and atomic force microscopy. Wettability measurements showed an increased hydrophilicity of the pp hydrogels when stored in acidic buffers and a slightly hydrophobic behavior after immersion in alkaline solutions, indicating a pH-dependent behavior. Furthermore, the pp (p(HEMA-co-DEAEMA) (ppHD) hydrogels were deposited on gold electrodes and studied electrochemically to investigate the pH sensitivity of the hydrogels. The hydrogel coatings with a higher ratio of DEAEMA segments showed excellent pH responsiveness at the studied pHs (pH 4, 7, and 10), demonstrating the importance of the DEAEMA ratio in the functionality of pp hydrogel films. Due to their stability and pH-responsive properties, pp (p(HEMA-co-DEAEMA) hydrogels are conceivable candidates for functional and immobilization layers for biosensors.

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Boron nitride nanotubes supported icosahedral Pd nanoparticles: Enabling ultrahigh current density-superior hydrogen evolution activity and theoretical insights

Venkateswarlu,

Kim,

Balamurugan

et al. 2024

Applied Catalysis B: Environmental

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Microwave radiation-assisted covalent functionalization of boron nitride nanotubes and their grafting with cationic thermo and pH-sensitive hydrogel

Cited by 4 publications

References 67 publications

Potential Production of Theranostic Boron Nitride Nanotubes (64Cu-BNNTs) Radiolabeled by Neutron Capture

Potential Production of Theranostic Boron Nitride Nanotubes (64Cu-BNNTs) Radiolabeled by Neutron Capture

Study on the Interaction of Plasma-Polymerized Hydrogel Coatings with Aqueous Solutions of Different pH

Boron nitride nanotubes supported icosahedral Pd nanoparticles: Enabling ultrahigh current density-superior hydrogen evolution activity and theoretical insights

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