Ultraviolet Extinction and Visible Transparency by Ivy Nanoparticles

Li, Quanshui; Xia, Lijin; Zhang, Mingjun

doi:10.1007/s11671-010-9666-2

Cited by 25 publications

(30 citation statements)

References 20 publications

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“…These peaks were positively correlated with the AFM and DLS data, and confirmed the presence of the ivy nanoparticles. In previous studies, determination of the concentration of ivy nanoparticles in solution could only be estimated, owing to the limited quantity of nanoparticles [6]. Using the method developed above, after collecting the concentrated ivy nanoparticles, the samples were pooled and lyophilized to get an accurate measure of the dry weight of the ivy nanoparticles.…”

Section: Rsifroyalsocietypublishingorg J R Soc Interface 10: 20130392mentioning

confidence: 99%

“…Using the method developed above, after collecting the concentrated ivy nanoparticles, the samples were pooled and lyophilized to get an accurate measure of the dry weight of the ivy nanoparticles. To confirm that the previously observed UV/vis absorbance spectra [6,7] were due to the ivy nanoparticles alone, it was necessary to analyse the concentration-dependent effect of the ivy nanoparticles using UV/vis spectroscopy. As shown in figure 4a, when the concentration of the ivy nanoparticles decreased, the resulting absorbance decreased.…”

Section: Rsifroyalsocietypublishingorg J R Soc Interface 10: 20130392mentioning

confidence: 99%

“…The eluate was constantly monitored with a dual wavelength UV detector measuring at 280 and 320 nm. Ivy nanoparticle fractions were known to absorb UV at these wavelengths based on previous studies [6,7]. Fractions were also collected every minute over the course of 60 min for analysis by AFM.…”

Section: Experimental Set-up 41 Isolation and Physical Analysis Of mentioning

confidence: 99%

“…A recent study demonstrated, through ultraviolet/visible (UV/vis) spectroscopy, that the ivy nanoparticles exhibit a strong UV absorbance from 200 to 400 nm [6,7]. Comparison of the ivy nanoparticles with similar concentrations of ZnO and TiO 2 nanoparticles demonstrated an increased ability to block UV light, indicating a potential role for the ivy nanoparticles as sunscreen protective agents [3].…”

Section: Introductionmentioning

confidence: 99%

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Isolation and chemical analysis of nanoparticles from English ivy ( Hedera helix L.)

Lenaghan

Burris²,

Chourey

et al. 2013

J. R. Soc. Interface.

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Bio-inspiration for novel adhesive development has drawn increasing interest in recent years with the discovery of the nanoscale morphology of the gecko footpad and mussel adhesive proteins. Similar to these animal systems, it was discovered that English ivy (Hedera helix L.) secretes a high strength adhesive containing uniform nanoparticles. Recent studies have demonstrated that the ivy nanoparticles not only contribute to the high strength of this adhesive, but also have ultraviolet (UV) protective abilities, making them ideal for sunscreen and cosmetic fillers, and may be used as nanocarriers for drug delivery. To make these applications a reality, the chemical nature of the ivy nanoparticles must be elucidated. In the current work, a method was developed to harvest bulk ivy nanoparticles from an adventitious root culture system, and the chemical composition of the nanoparticles was analysed. UV/ visible spectroscopy, inductively coupled plasma mass spectrometry, Fourier transform infrared spectroscopy and electrophoresis were used in this study to identify the chemical nature of the ivy nanoparticles. Based on this analysis, we conclude that the ivy nanoparticles are proteinaceous.

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Section: Rsifroyalsocietypublishingorg J R Soc Interface 10: 20130392mentioning

confidence: 99%

Section: Rsifroyalsocietypublishingorg J R Soc Interface 10: 20130392mentioning

confidence: 99%

Section: Experimental Set-up 41 Isolation and Physical Analysis Of mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Isolation and chemical analysis of nanoparticles from English ivy ( Hedera helix L.)

Lenaghan

Burris²,

Chourey

et al. 2013

J. R. Soc. Interface.

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“…1) were secreted in the adhesive of English ivy and played an important role in generating the adhesive force necessary for the plant to climb near vertical surfaces [11]. Further studies with the ivy nanoparticles demonstrated an increased UV protective effect when compared to T i O 2 or Z n O nanoparticle fillers commonly used in sunscreens, indicating potential applications for the ivy nanoparticle sunscreen additives [12], [13]. Further analysis showed that at similar concentrations, ivy nanoparticles were nontoxic, when compared to T i O 2 nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Automated high throughput scalable green nanomanufacturing for naturally occurring nanoparticles using English ivy

Lenaghan

Gilmore

et al. 2012

2012 IEEE International Conference on Robotics and Automation

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The discovery of novel nanomaterials, such as nanoparticles and nanofibers, is crucial to the expansion of the nanotechnology field. Of even greater importance, is the identification of nanomaterials that exist in nature and have low environmental toxicity when compared to man-made nanomaterials. In 2008, our group first discovered that ivy secretes nanoparticles for surface affixing. It was further demonstrated that these nanoparticles could be used for biomedical applications. This paper proposes an automated framework for high throughput scalable green nanomanufacturing of these naturally occurring nanoparticles. Several parameters necessary to optimize the growth of the ivy, including temperature, humidity, and light level, were regulated using feedback controls. Since the contact of ivy rootlets with a substrate is necessary to initiate the secretion of ivy adhesive, an electromechanical system was designed to automatically stimulate the rootlets to start the nanoparticle secretion process. The contact of ivy rootlets with a surface was formulated as a linear viscoelastic model and a speed control law was proposed for the actuator of the automated system. The proposed framework was verified through prototype experiments, and demonstrated promise for high throughput production of ivy nanoparticles.

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Absorption and Scattering Behavior of Nanofluids in the Visible Range

Eggers

Kabelac

2015

Int J Thermophys

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Ultraviolet Extinction and Visible Transparency by Ivy Nanoparticles

Cited by 25 publications

References 20 publications

Isolation and chemical analysis of nanoparticles from English ivy ( Hedera helix L.)

Isolation and chemical analysis of nanoparticles from English ivy ( Hedera helix L.)

Automated high throughput scalable green nanomanufacturing for naturally occurring nanoparticles using English ivy

Absorption and Scattering Behavior of Nanofluids in the Visible Range

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