Synthesis and characterization of PVP-coated tellurium nanorods and their antibacterial and anticancer properties

Brown, Christopher D.; Cruz, David Medina; Roy, Amit; Webster, Thomas J.

doi:10.1007/s11051-018-4354-8

Cited by 31 publications

(25 citation statements)

References 46 publications

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“…It may be argued that wherever there is a bunch of Te nanorods, the Ti nanocolumns are hidden, modifying the non-adhesive behavior. Contact angle measurements (see The antibacterial effect of the tellurium nanorods alone was reported in a previous study [40],…”

Section: Accepted Manuscriptmentioning

confidence: 76%

Synergic antibacterial coatings combining titanium nanocolumns and tellurium nanorods

Medina-Cruz

González

Tien-Street

et al. 2019

Nanomedicine: Nanotechnology, Biology and Medicine

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Nanocolumnar titanium coatings have been fabricated in two sputtering systems with very different characteristics (a laboratory setup and semi-industrial equipment), thus possessing different morphologies (150 nm long columns tilted 20º from the normal and 300 nm long ones tilted 40º, respectively). These coatings exhibit similar antibacterial properties against Gram positive (Staphylococcus aureus) and Gram negative (Escherichia coli) bacteria. When a synergic route is followed and these coatings are functionalized with tellurium (Te) nanorods, the antibacterial properties are enhanced, especially for the long nanocolumns case. The biocompatibility is preserved in all the nanostructured coatings.

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Section: Accepted Manuscriptmentioning

confidence: 76%

Synergic antibacterial coatings combining titanium nanocolumns and tellurium nanorods

Medina-Cruz

González

Tien-Street

et al. 2019

Nanomedicine: Nanotechnology, Biology and Medicine

Self Cite

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“…Furthermore, hydrothermal methods have been gaining attention as green chemistry approaches due to the ability to adapt these reactions to environmentally friendly methods for NP production. 33 From all of the aforementioned natural raw materials, biodegradable natural polymers, such as starch and chitosan, represent an outstanding alternative for the eco-friendly synthesis of noble metallic NPs. For instance, the starch-assisted synthesis of colloidal monometallic AgNPs and AuNPs has been extensively documented, [34][35][36][37][38][39] but very few studies have reported the synthesis of colloidal starch-stabilized Ag/Au alloy NPs.…”

Section: Introductionmentioning

confidence: 99%

<p>Starch-mediated synthesis of mono- and bimetallic silver/gold nanoparticles as antimicrobial and anticancer agents</p>

Lomelí-Marroquín

Medina-Cruz

Nieto-Argüello

et al. 2019

IJN

113

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Background and aim: Bimetallic silver/gold nanosystems are expected to significantly improve therapeutic efficacy compared to their monometallic counterparts by maintaining the general biocompatibility of gold nanoparticles (AuNPs) while, at the same time, decreasing the relatively high toxicity of silver nanoparticles (AgNPs) toward healthy human cells. Thus, the aim of this research was to establish a highly reproducible one-pot green synthesis of colloidal AuNPs and bimetallic Ag/Au alloy nanoparticles (NPs; Ag/AuNPs) using starch as reducing and capping agent. Methods: The optical properties, high reproducibility, stability and particle size distribution of the colloidal NPs were analyzed by ultraviolet (UV)-visible spectroscopy, dynamic light scattering (DLS) and ζ-potential. The presence of starch as capping agent was determined by Fourier transform infrared (FT-IR) spectroscopy. The structural properties were studied by X-ray diffraction (XRD). Transmission electron microscopy (TEM) imaging was done to determine the morphology and size of the nanostructures. The chemical composition of the nanomaterials was determined by energy-dispersive X-ray spectroscopy (EDS) and inductively coupled plasma mass spectrometry (ICP-MS) analysis. To further study the biomedical applications of the synthesized nanostructures, antibacterial studies against multidrug-resistant (MDR) Escherichia coli and methicillin-resistant Staphylococcus aureus (MRSA) were conducted. In addition, the NPs were added to the growth media of human dermal fibroblast (HDF) and human melanoma cells to show their cytocompatibility and cytotoxicity, respectively, over a 3-day experiment. Results: UV-visible spectroscopy confirmed the highly reproducible green synthesis of colloidal AuNPs and Ag/AuNPs. The NPs showed a face-centered cubic crystal structure and an icosahedral shape with mean particle sizes of 28.5 and 9.7 nm for AuNPs and Ag/AuNPs, respectively. The antibacterial studies of the NPs against antibiotic-resistant bacterial strains presented a dose-dependent antimicrobial behavior. Furthermore, the NPs showed cytocompatibility towards HDF, but a dose-dependent anticancer effect was found when human melanoma cells were grown in presence of different NP concentrations for 72 hours. Conclusion: In this study, mono-and bimetallic NPs were synthesized for the first time using a highly reproducible, environmentally friendly, cost-effective and quick method and were successfully characterized and tested for several anti-infection and anticancer biomedical applications.

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“…These properties make bulk Tellurium a potential candidate for applications in photoconductors [34,35], solar cells [36], infrared acousto-optic deflectors [37], field effect transistors [38], self-developing holographic recording devices [39], radiative cooling devices [40], topological insulators [41] and gas sensing [42]. However, when the size of Tellurium is in nanoscale, it has been confirmed to exhibit some new physical properties [43,44,45,46,47]. In the last few years, a successful fabrication of Tellurium nanostructures has been witnessed such as ultrathin Te-epilayers [43], nanowires [44], nanoplates [45], and nanorods [46].…”

Section: Introductionmentioning

confidence: 99%

“…However, when the size of Tellurium is in nanoscale, it has been confirmed to exhibit some new physical properties [43,44,45,46,47]. In the last few years, a successful fabrication of Tellurium nanostructures has been witnessed such as ultrathin Te-epilayers [43], nanowires [44], nanoplates [45], and nanorods [46]. Recently, a breakthrough in obtaining a solution–grown 2D Tellurene (Te, Tellurium in few-layer structure) with a large area, and high-quality flake with high mobility of ~700 cm 2 has been reported in 2018 [47].…”

Section: Introductionmentioning

confidence: 99%

Electronic and Optical Properties of Two-Dimensional Tellurene: From First-Principles Calculations

et al. 2019

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Tellurene is a new-emerging two-dimensional anisotropic semiconductor, with fascinating electric and optical properties that differ dramatically from the bulk counterpart. In this work, the layer dependent electronic and optical properties of few-layer Tellurene has been calculated with the density functional theory (DFT). It shows that the band gap of the Tellurene changes from direct to indirect when layer number changes from monolayer (1 L) to few-layers (2 L–6 L) due to structural reconstruction. Tellurene also has an energy gap that can be tuned from 1.0 eV (1 L) to 0.3 eV (6 L). Furthermore, due to the interplay of spin–orbit coupling (SOC) and disappearance of inversion symmetry in odd-numbered layer structures resulting in the anisotropic SOC splitting, the decrease of the band gap with an increasing layer number is not monotonic but rather shows an odd-even quantum confinement effect. The optical results in Tellurene are layer dependent and different in E ⊥ C and E || C directions. The correlations between the structure, the electronic and optical properties of the Tellurene have been identified. Despite the weak nature of interlayer forces in their structure, their electronic and optical properties are highly dependent on the number of layers and highly anisotropic. These results are essential in the realization of its full potential and recommended for experimental exploration.

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Synthesis and characterization of PVP-coated tellurium nanorods and their antibacterial and anticancer properties

Cited by 31 publications

References 46 publications

Synergic antibacterial coatings combining titanium nanocolumns and tellurium nanorods

Synergic antibacterial coatings combining titanium nanocolumns and tellurium nanorods

<p>Starch-mediated synthesis of mono- and bimetallic silver/gold nanoparticles as antimicrobial and anticancer agents</p>

Electronic and Optical Properties of Two-Dimensional Tellurene: From First-Principles Calculations

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