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Applied Sciences
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Optical Characterizations of Nanomaterials, Biomaterials and Plasma-Treated Medium
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Optical Characterizations of Nanomaterials, Biomaterials and Plasma-Treated Medium

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Materials Science and Engineering".

Deadline for manuscript submissions: closed (30 September 2021) | Viewed by 6535

Special Issue Editors

Prof. Dr. Geon Joon Lee

E-Mail Website
Guest Editor
Associate Professor, Department of Electrical and Biological Physics, Kwangwoon University, Seoul 01897, Korea
Interests: optical spectroscopy (surface-enhanced Raman scattering, fluorescence, chirality, attenuated total reflection spectroscopy); surface plasmon resonance effects; nonlinear optical effects; nanophotonics; biophotonics; plasma-treated medium; plasma-induced reactive species; plasma treatment effects
Special Issues, Collections and Topics in MDPI journals
Dr. Alexey Seteikin

E-Mail Website
Guest Editor
Fundamental and Applied Photonics Department, Immanuel Kant Baltic Federal University, 14 A. Nevskogo ul., Kaliningrad 236016, Russia
Interests: biomedical optics; Raman spectroscopy; optical spectroscopy (scattering, luminescence, etc.); laser-tissue interaction; nanobiotechnologies; mathematical simulation
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Nagendra Kumar Kaushik

E-Mail Website
Guest Editor
Department of Electrical and Biological Physics, Plasma Bioscience Research Center, Kwangwoon University, Seoul 01897, Republic of Korea
Interests: plasma medicine; biophysics; biomaterials; nanotechnology; nanomedicine
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Nanostructured materials have unique physical and chemical properties as a result of their small size. These properties differ from those of the corresponding bulk materials. Experimentally, there have been many research efforts devoted to the structural, electrical, and optical properties of low-dimensional structures, such as quantum wells, quantum dots, nanoparticles, nanowires, and nanotubes. Nanostructured materials have drawn considerable attention owing to potential applications in biomedical imaging, light emitting devices, nanolasers, photodetectors, solar cells, and sensors.

A biomaterial is any substance that has been engineered to interact with biological systems for a medical purpose-either therapeutic or diagnostic. Biomaterials science encompasses elements of medicine, biology, chemistry, tissue engineering, and materials science. Biocompatible biomaterials are used in many medical applications, such as to treat various human diseases, and can be implanted to replace or repair missing tissue.

An atmospheric-pressure plasma jet or a dielectric barrier discharge plasma has been used for nonthermal plasma treatment of biological materials to sterilize, inactivate, and remove microorganisms; and for wound healing, tooth bleaching, cancer treatment, and surface modification. Plasma treatments alter optical and structural properties of medium. Plasma is also used in biomaterial surface modification and can be combined with other treatment methods for various biomedical applications.

Because optical probes can provide a noninvasive and rapid diagnosis of optical materials, it is necessary to study the optical characterization of nanomaterials, biomaterials, and plasma-treated medium.

“Optical Characterizations of Nanomaterials, Biomaterials, and Plasma-Treated Medium” aims to cover all the latest outstanding developments in optical properties of nanomaterials, biomaterials, and plasma-treated medium. This Special Issue will describe recent research and developments in the field of optical characterizations of nanomaterials and biomaterials, and plasma-treated medium. We invite authors to contribute original research articles as well as review articles in the optical characterizations of nanomaterials, biomaterials, and plasma-treated medium.

Prof. Dr. Geon Joon Lee
Prof. Dr. Alexey Seteikin
Prof. Dr. Nagendra Kumar Kaushik
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Optical characterizations of nanomaterials and nanostructures
  • Optical characterizations of biomaterials and biofilms
  • Optical characterizations of plasma-activated medium and plasma-treated surface/interface
  • Optical imaging, sensing, and spectroscopic study of biomaterials, nanomaterials, and plasma-treated medium
  • Plasma medicine/nanomedicine/cancer therapy/sterilization based on optical spectroscopy and imaging
  • Numerical simulation study for optical properties of biomaterials and nanomaterials

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Published Papers (2 papers)

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Research

16 pages, 3316 KiB  
Article
Plasmon Resonant Two-Photon Luminescence Inducing Photosensitization and Nonlinear Optical Microscopy In Vivo by Near-Infrared Excitation of Au Nanopeanuts
by Lun-Zhang Guo, Cheng-Ham Wu, Ming-Fong Tsai, Fong-Yu Cheng, Vijayakumar Shanmugam, Zen-Uong Tsai, Zhiming Zhang, Tzu-Ming Liu and Chen-Sheng Yeh
Appl. Sci. 2021, 11(22), 10875; https://doi.org/10.3390/app112210875 - 17 Nov 2021
Cited by 1 | Viewed by 2395
Abstract
Photodynamic therapy (PDT) provides a potential therapeutic approach for killing malignant cell/solid tumors, but currently approved photosensitizers (PSs) are generally excited by visible light, limiting the penetration depth in tissues. It is necessary to develop a near-infrared (NIR) responsive photodynamic platform, providing maximum [...] Read more.
Photodynamic therapy (PDT) provides a potential therapeutic approach for killing malignant cell/solid tumors, but currently approved photosensitizers (PSs) are generally excited by visible light, limiting the penetration depth in tissues. It is necessary to develop a near-infrared (NIR) responsive photodynamic platform, providing maximum tissue penetration. Here, we present a gold nanopeanut platform exhibiting dual functions of NIR PDT and two-photon luminescence imaging. The nanopeanut with a size less than 100 nm exhibits two distinct NIR surface plasmon absorption bands at approximately 1110 and 1300 nm. To perform PDT, we conjugated commercial toluidine blue O (TBO) PS on the surface of the nanopeanuts. With spectral overlap, the 1230-nm femtosecond Cr: forsterite laser can excite the surface plasmons of nanopeanuts, transfer energy to TBO, and generate singlet oxygen to kill cells. Moreover, the plasmon resonance-enhanced two-photon luminescence of nanopeanuts can be used to map their delivery in vivo. These results demonstrate that the PS-conjugated gold nanopeanut is an effective theranostic system for NIR PDT. Full article
(This article belongs to the Special Issue Optical Characterizations of Nanomaterials, Biomaterials and Plasma-Treated Medium)
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16 pages, 4229 KiB  
Article
Influence of Nonthermal Atmospheric Plasma-Activated Water on the Structural, Optical, and Biological Properties of Aspergillus brasiliensis Spores
by Se Hoon Ki, Hyeongjin Noh, Geum Ran Ahn, Seong Hwan Kim, Nagendra K. Kaushik, Eun Ha Choi and Geon Joon Lee
Appl. Sci. 2020, 10(18), 6378; https://doi.org/10.3390/app10186378 - 13 Sep 2020
Cited by 23 | Viewed by 3440
Abstract
Plasma-activated water (PAW) has emerged as a platform for sterilizing fungal pathogens. In this study, we investigated the influence of PAW on black melanized spores of Aspergillus brasiliensis to explore the mechanism of fungal spore inactivation. PAW was prepared by activating deionized water [...] Read more.
Plasma-activated water (PAW) has emerged as a platform for sterilizing fungal pathogens. In this study, we investigated the influence of PAW on black melanized spores of Aspergillus brasiliensis to explore the mechanism of fungal spore inactivation. PAW was prepared by activating deionized water with a nonthermal atmospheric pressure air plasma jet (soft plasma jet). The concentrations of H2O2 and NOx in the PAW treated by the soft plasma jet for 3 min were 50 μM and 1.8 mM, respectively, and the pH of the PAW was 3.10. The reactive oxygen and nitrogen species (RONS) in the PAW increased with longer plasma activation time. After being treated for 30 min in the PAW with a plasma activation time of 3 min, the spore viability dramatically dropped to 15%. The viabilities of 0.3% H2O2- and 0.3% HNO3-treated spores were 22% and 42%, respectively. The breakage of the spore cell wall by the PAW was revealed in scanning electron microscope images and flow cytometry measurements. Disruption of cell wall integrity provides a path for intracellular components to escape and RONS of the PAW can attack intracellular components directly. Degradation of high molecular genomic DNA was also observed by agarose gel electrophoresis. These results suggest that long-lived reactive species generated in the PAW play an important role in the inactivation of melanized fungal spores. Consequently, PAW produced by a soft plasma jet can be applied to sterilize bioprotective walled fungal spores in a relatively large volume. Full article
(This article belongs to the Special Issue Optical Characterizations of Nanomaterials, Biomaterials and Plasma-Treated Medium)
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