Elena Ivanova - Academia.edu (original) (raw)

Uploads

Papers by Elena Ivanova

Research paper thumbnail of Critical Review of Nanopillar-Based Mechanobactericidal Systems

Research paper thumbnail of Current Perspectives on the Development of Virucidal Nano Surfaces

Current Opinion in Colloid and Interface Science, Oct 1, 2023

Research paper thumbnail of Study of melanin localization in the mature maleCalopteryx haemorrhoidalisdamselfly wings

Journal of Synchrotron Radiation, Apr 25, 2018

Research paper thumbnail of The susceptibility of Staphylococcus aureus CIP 65.8 and Pseudomonas aeruginosa ATCC 9721 cells to the bactericidal action of nanostructured Calopteryx haemorrhoidalis damselfly wing surfaces

Applied Microbiology and Biotechnology, Mar 1, 2017

Research paper thumbnail of Simulations of Protein Adsorption on Nanostructured Surfaces

Scientific Reports, Mar 18, 2019

Research paper thumbnail of Outsmarting superbugs: bactericidal activity of nanostructured titanium surfaces against methicillin- and gentamicin-resistant<i>Staphylococcus aureus</i>ATCC 33592

Journal of Materials Chemistry B, 2019

Research paper thumbnail of Mechano-bactericidal actions of nanostructured surfaces

Nature Reviews Microbiology, Aug 17, 2020

Research paper thumbnail of Antifungal versus antibacterial defence of insect wings

Journal of Colloid and Interface Science, Dec 1, 2021

Research paper thumbnail of Mechano-bactericidal mechanism of graphene nanomaterials

Interface Focus, Apr 20, 2018

Research paper thumbnail of Tunable morphological changes of asymmetric titanium nanosheets with bactericidal properties

Journal of Colloid and Interface Science, Feb 1, 2020

Research paper thumbnail of Lethal Interactions of Atomically Precise Gold Nanoclusters and <i>Pseudomonas aeruginosa</i> and <i>Staphylococcus aureus</i> Bacterial Cells

ACS Applied Materials & Interfaces, Jun 27, 2022

Research paper thumbnail of The effect of a high frequency electromagnetic field in the microwave range on red blood cells

Scientific Reports, Sep 7, 2017

Research paper thumbnail of Subtle Variations in Surface Properties of Black Silicon Surfaces Influence the Degree of Bactericidal Efficiency

Nano-micro Letters, Feb 6, 2018

Research paper thumbnail of The idiosyncratic self-cleaning cycle of bacteria on regularly arrayed mechano-bactericidal nanostructures

Research paper thumbnail of Functionalized Gold Nanoclusters Promote Stress Response in COS‐7 Cells

Advanced NanoBiomed Research

Ultrasmall gold nanoclusters (AuNC) show great promise for application in theranostics due to the... more Ultrasmall gold nanoclusters (AuNC) show great promise for application in theranostics due to their unique optical and physicochemical properties; however, the associated nanotoxicology concerns need to be carefully considered because of their high diffusion across the cellular barrier. Herein, new insights into the role of surface modification of 2 nm AuNC on their toxicity with impact on the metabolism of COS‐7 fibroblast‐like cells are revealed. AuNCs are chemically modified with either a monodentate‐thiolated molecule (AuNC‐MHA) or a modified‐bidentate sulfobetaine zwitterionic molecule (AuNC‐ZwBuEt). Uptake and localization inside fibroblasts and the resultant influence on cell ultrastructure are carefully evaluated using scanning transmission electron microscopy (STEM) and cryo‐soft‐X‐ray tomography (cryo‐SXT). At concentrations of ≥25 μg Au mL−1, AuNC‐ZwBuEt are cytotoxic toward COS‐7 cells and are observed to cross the nuclear membrane. Cryo‐SXT analysis shows that fibroblas...

Research paper thumbnail of Antibacterial Action: Antibacterial Action of Nanoparticles by Lethal Stretching of Bacterial Cell Membranes (Adv. Mater. 52/2020)

Research paper thumbnail of Antifungal versus antibacterial defence of insect wings

Journal of Colloid and Interface Science, 2021

Research paper thumbnail of Towards antiviral polymer composites to combat COVID‐19 transmission

Nano Select, 2021

Polymer matrix composite materials have the capacity to aid the indirect transmission of viral di... more Polymer matrix composite materials have the capacity to aid the indirect transmission of viral diseases. Published research shows that respiratory viruses, including severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2 or COVID‐19), can attach to polymer substrata as a result of being contacted by airborne droplets resulting from infected people sneezing or coughing in close proximity. Polymer matrix composites are used to produce a wide range of products that are “high‐touch” surfaces, such as sporting goods, laptop computers and household fittings, and these surfaces can be readily contaminated by pathogens. This article reviews published research on the retention of SARS‐CoV‐2 and other virus types on plastics. The factors controlling the viral retention time on plastic surfaces are examined and the implications for viral retention on polymer composite materials are discussed. Potential strategies that can be used to impart antiviral properties to polymer composite surface...

Research paper thumbnail of High Aspect Ratio Nanostructures Kill Bacteria via Storage and Release of Mechanical Energy

ACS nano, Jan 11, 2018

The threat of a global rise in the number of untreatable infections caused by antibiotic-resistan... more The threat of a global rise in the number of untreatable infections caused by antibiotic-resistant bacteria calls for the design and fabrication of a new generation of bactericidal materials. Here, we report a concept for the design of antibacterial surfaces, whereby cell death results from the ability of the nanofeatures to deflect when in contact with attaching cells. We show, using three-dimensional transmission electron microscopy, that the exceptionally high aspect ratio (100-3000) of vertically aligned carbon nanotubes (VACNTs) imparts extreme flexibility, which enhances the elastic energy storage in CNTs as they bend in contact with bacteria. Our experimental and theoretical analyses demonstrate that, for high aspect ratio structures, the bending energy stored in the CNTs is a substantial factor for the physical rupturing of both Gram-positive and Gram-negative bacteria. The highest bactericidal rates (99.3% for Pseudomonas aeruginosa and 84.9% for Staphylococcus aureus) were...

Research paper thumbnail of The Evolution of Silica Nanoparticle-polyester Coatings on Surfaces Exposed to Sunlight

Journal of Visualized Experiments, 2016

Research paper thumbnail of Critical Review of Nanopillar-Based Mechanobactericidal Systems

Research paper thumbnail of Current Perspectives on the Development of Virucidal Nano Surfaces

Current Opinion in Colloid and Interface Science, Oct 1, 2023

Research paper thumbnail of Study of melanin localization in the mature maleCalopteryx haemorrhoidalisdamselfly wings

Journal of Synchrotron Radiation, Apr 25, 2018

Research paper thumbnail of The susceptibility of Staphylococcus aureus CIP 65.8 and Pseudomonas aeruginosa ATCC 9721 cells to the bactericidal action of nanostructured Calopteryx haemorrhoidalis damselfly wing surfaces

Applied Microbiology and Biotechnology, Mar 1, 2017

Research paper thumbnail of Simulations of Protein Adsorption on Nanostructured Surfaces

Scientific Reports, Mar 18, 2019

Research paper thumbnail of Outsmarting superbugs: bactericidal activity of nanostructured titanium surfaces against methicillin- and gentamicin-resistant<i>Staphylococcus aureus</i>ATCC 33592

Journal of Materials Chemistry B, 2019

Research paper thumbnail of Mechano-bactericidal actions of nanostructured surfaces

Nature Reviews Microbiology, Aug 17, 2020

Research paper thumbnail of Antifungal versus antibacterial defence of insect wings

Journal of Colloid and Interface Science, Dec 1, 2021

Research paper thumbnail of Mechano-bactericidal mechanism of graphene nanomaterials

Interface Focus, Apr 20, 2018

Research paper thumbnail of Tunable morphological changes of asymmetric titanium nanosheets with bactericidal properties

Journal of Colloid and Interface Science, Feb 1, 2020

Research paper thumbnail of Lethal Interactions of Atomically Precise Gold Nanoclusters and <i>Pseudomonas aeruginosa</i> and <i>Staphylococcus aureus</i> Bacterial Cells

ACS Applied Materials & Interfaces, Jun 27, 2022

Research paper thumbnail of The effect of a high frequency electromagnetic field in the microwave range on red blood cells

Scientific Reports, Sep 7, 2017

Research paper thumbnail of Subtle Variations in Surface Properties of Black Silicon Surfaces Influence the Degree of Bactericidal Efficiency

Nano-micro Letters, Feb 6, 2018

Research paper thumbnail of The idiosyncratic self-cleaning cycle of bacteria on regularly arrayed mechano-bactericidal nanostructures

Research paper thumbnail of Functionalized Gold Nanoclusters Promote Stress Response in COS‐7 Cells

Advanced NanoBiomed Research

Ultrasmall gold nanoclusters (AuNC) show great promise for application in theranostics due to the... more Ultrasmall gold nanoclusters (AuNC) show great promise for application in theranostics due to their unique optical and physicochemical properties; however, the associated nanotoxicology concerns need to be carefully considered because of their high diffusion across the cellular barrier. Herein, new insights into the role of surface modification of 2 nm AuNC on their toxicity with impact on the metabolism of COS‐7 fibroblast‐like cells are revealed. AuNCs are chemically modified with either a monodentate‐thiolated molecule (AuNC‐MHA) or a modified‐bidentate sulfobetaine zwitterionic molecule (AuNC‐ZwBuEt). Uptake and localization inside fibroblasts and the resultant influence on cell ultrastructure are carefully evaluated using scanning transmission electron microscopy (STEM) and cryo‐soft‐X‐ray tomography (cryo‐SXT). At concentrations of ≥25 μg Au mL−1, AuNC‐ZwBuEt are cytotoxic toward COS‐7 cells and are observed to cross the nuclear membrane. Cryo‐SXT analysis shows that fibroblas...

Research paper thumbnail of Antibacterial Action: Antibacterial Action of Nanoparticles by Lethal Stretching of Bacterial Cell Membranes (Adv. Mater. 52/2020)

Research paper thumbnail of Antifungal versus antibacterial defence of insect wings

Journal of Colloid and Interface Science, 2021

Research paper thumbnail of Towards antiviral polymer composites to combat COVID‐19 transmission

Nano Select, 2021

Polymer matrix composite materials have the capacity to aid the indirect transmission of viral di... more Polymer matrix composite materials have the capacity to aid the indirect transmission of viral diseases. Published research shows that respiratory viruses, including severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2 or COVID‐19), can attach to polymer substrata as a result of being contacted by airborne droplets resulting from infected people sneezing or coughing in close proximity. Polymer matrix composites are used to produce a wide range of products that are “high‐touch” surfaces, such as sporting goods, laptop computers and household fittings, and these surfaces can be readily contaminated by pathogens. This article reviews published research on the retention of SARS‐CoV‐2 and other virus types on plastics. The factors controlling the viral retention time on plastic surfaces are examined and the implications for viral retention on polymer composite materials are discussed. Potential strategies that can be used to impart antiviral properties to polymer composite surface...

Research paper thumbnail of High Aspect Ratio Nanostructures Kill Bacteria via Storage and Release of Mechanical Energy

ACS nano, Jan 11, 2018

The threat of a global rise in the number of untreatable infections caused by antibiotic-resistan... more The threat of a global rise in the number of untreatable infections caused by antibiotic-resistant bacteria calls for the design and fabrication of a new generation of bactericidal materials. Here, we report a concept for the design of antibacterial surfaces, whereby cell death results from the ability of the nanofeatures to deflect when in contact with attaching cells. We show, using three-dimensional transmission electron microscopy, that the exceptionally high aspect ratio (100-3000) of vertically aligned carbon nanotubes (VACNTs) imparts extreme flexibility, which enhances the elastic energy storage in CNTs as they bend in contact with bacteria. Our experimental and theoretical analyses demonstrate that, for high aspect ratio structures, the bending energy stored in the CNTs is a substantial factor for the physical rupturing of both Gram-positive and Gram-negative bacteria. The highest bactericidal rates (99.3% for Pseudomonas aeruginosa and 84.9% for Staphylococcus aureus) were...

Research paper thumbnail of The Evolution of Silica Nanoparticle-polyester Coatings on Surfaces Exposed to Sunlight

Journal of Visualized Experiments, 2016

Log In