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Bioengineering 2019, 6(1), 26; https://doi.org/10.3390/bioengineering6010026

Nanostructured Materials for Food Applications: Spectroscopy, Microscopy and Physical Properties

1
School of Food Science and Environmental Health, College of Sciences and Health, Technological University Dublin, City Campus, Cathal Brugha Street, Dublin D01 HV58, Ireland
2
Centre for Research in Engineering and Surface Technology (CREST), FOCAS Institute, Technological University Dublin, City Campus, Kevin Street, Dublin D08 NF82, Ireland
*
Author to whom correspondence should be addressed.
Received: 7 March 2019 / Revised: 12 March 2019 / Accepted: 14 March 2019 / Published: 19 March 2019
(This article belongs to the Special Issue Noble Metal Functionalized Nanoparticles for Biomedical Applications)
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PDF [607 KB, uploaded 19 March 2019]
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Abstract

Nanotechnology deals with matter of atomic or molecular scale. Other factors that define the character of a nanoparticle are its physical and chemical properties, such as surface area, surface charge, hydrophobicity of the surface, thermal stability of the nanoparticle and its antimicrobial activity. A nanoparticle is usually characterized by using microscopic and spectroscopic techniques. Microscopic techniques are used to characterise the size, shape and location of the nanoparticle by producing an image of the individual nanoparticle. Several techniques, such as scanning electron microscopy (SEM), transmission electron microscopy/high resolution transmission electron microscopy (TEM/HRTEM), atomic force microscopy (AFM) and scanning tunnelling microscopy (STM) have been developed to observe and characterise the surface and structural properties of nanostructured material. Spectroscopic techniques are used to study the interaction of a nanoparticle with electromagnetic radiations as the function of wavelength, such as Raman spectroscopy, UV–Visible spectroscopy, attenuated total reflectance Fourier-transform infrared spectroscopy (ATR-FTIR), dynamic light scattering spectroscopy (DLS), Zeta potential spectroscopy, X-ray photoelectron spectroscopy (XPS) and X-ray photon correlation spectroscopy. Nanostructured materials have a wide application in the food industry as nanofood, nano-encapsulated probiotics, edible nano-coatings and in active and smart packaging. View Full-Text
Keywords: nanotechnology; characterisation; microscopy; spectroscopy; food industry nanotechnology; characterisation; microscopy; spectroscopy; food industry
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Sharma, S.; Jaiswal, S.; Duffy, B.; Jaiswal, A.K. Nanostructured Materials for Food Applications: Spectroscopy, Microscopy and Physical Properties. Bioengineering 2019, 6, 26.

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