Peer Review #2 of "A simple method of equine limb force vector analysis and its potential applications (v0.2)"

A simple method to determine the frictional interaction between a carbon nanotube (CNT) and a substrate is analyzed for feasibility. In this technique an atomic force microscope (AFM) tip is used to drag a CNT along a substrate. Then the deformed shape of the CNT can be viewed either with the AFM or in a scanning electron microscope. An analysis of the steady-state deformed shape allows the determination of the frictional interactions, which occurred during dragging. It is important to quantify these interactions in a variety of potential applications of nanotechnology. In one such example, a CNT based nanoswitch consists of a CNT bridging over a trench. Actuation of the CNT causes it to stretch and can lead to partial slip at the interface. This slip causes hysteresis, which has been observed in the mechanical actuation of a CNT bridge. In this paper continuum level modeling of the frictional interaction is used to determine the relationship between the steady-state deformed shape of the CNT and the frictional interaction, which occurred between the CNT and substrate during dragging. The model and analysis indicate that this method should be feasible for CNTs with aspect ratios approximately in the 100–250 range.

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Hydrothermal synthesis of carbon nanodots from wine cork and biocompatible fluorescent probe

10.3762/bxiv.2021.45.v1 ◽

2021 ◽

Author(s):

Ngo Khoa Quang ◽

Nguyen Ngoc Hieu ◽

Vo Van Quoc Bao ◽

Vo Thi Phuoc ◽

Le Xuan Diem Ngoc ◽

...

Keyword(s):

Stem Cells ◽

Hydrothermal Synthesis ◽

Low Cost ◽

Average Diameter ◽

Optical Measurements ◽

Carbon Nanodots ◽

Structural And Optical Properties ◽

Simple Method ◽

Fluorescent Image ◽

Potential Applications

We presented a low-cost and simple method to synthesize carbon nanodots (CDs) from waste wine cork using hydrothermal synthesis. The structural and optical properties of the CDs are characterized by TEM, FTIR, Raman, UV-Vis absorption, and photoluminescence (PL) spectra. The analysis results indicated the average diameter of CDs ⁓ 6.2 ± 2.7 nm. Optical measurements showed the phenomenon of excitation-dependent PL and the formation of functional groups on the surface of the particles. CDs with a quantum yield of 1.54% was calculated using quinine sulfate as reference. Furthermore, a probe of wine cork-derived CDs in bioimaging has been successfully applied in living mesenchymal stem cells (MSCs). After treatment with CDs, MSCs exhibited fluorescence including green, yellow, and red colors under the excitation wavelengths in the range 330–385 nm, 450–480 nm, and 510–550 nm, respectively. The achievement demonstrated potential applications of fluorescent CDs in the field of the fluorescent image.

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Green Reduction of Graphene Oxide Involving Extracts of Plants from Different Taxonomy Groups and Its Applications

10.20944/preprints202111.0056.v1 ◽

2021 ◽

Author(s):

Dharshini Perumal ◽

Emmellie Laura Albert ◽

Che Azurahanim Che Abdullah

Keyword(s):

Graphene Oxide ◽

Green Synthesis ◽

Plant Extract ◽

Chemical Reduction ◽

Lightweight Design ◽

Environmentally Friendly ◽

Cost Effective ◽

Simple Method ◽

Reduced Graphene ◽

Potential Applications

Graphene is a remarkable material with numerous applications. Due to its thin and lightweight design, it is ideal for a variety of applications. The synthesis of high-quality graphene in a cost-effective and environmentally friendly manner continues to be a significant challenge. Chemical reduction is considered to be the most advantageous method for preparing reduced graphene oxide (rGO). However, this process necessitates the use of toxic and harmful substances, which can have a detrimental effect on the environment and human health. Thus, to accomplish the objective, the green synthesis principle has prompted researchers worldwide to develop a simple method for green reduction of graphene oxide (GO), which is readily accessible, sustainable, economical, renewable, and environmentally friendly in nature. For example, the use of natural materials such as plants is generally considered safe. Furthermore, plants contain reducing and capping agents. The current review will focus on the discovery and application of rGO synthesis using extracts from a variety of different parts of the plant. The review aims to aid current and future researchers in their search for a novel plant extract that acts as a reductant in the green synthesis of rGO. The review aims to assist current and future researchers in their research for a novel plant extract that acts as a reductant in the green synthesis of rGO as well as their potential applications in a variety of industries.

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A Simple Method of Simultaneously Endowing Paper or Fluff Pulp With Both High Softness or Appropriate Fluffing Properties and Antimicrobial Properties

10.21203/rs.3.rs-305149/v1 ◽

2021 ◽

Author(s):

Yongjian Xu ◽

Yun Shi ◽

Xuyong Chen ◽

Fenfen Liu ◽

Wei Zhao

Keyword(s):

Microbial Contamination ◽

Antibacterial Property ◽

Antimicrobial Properties ◽

Living Standard ◽

Simple Method ◽

Burst Strength ◽

Alkyl Chains ◽

Sanitary Products ◽

Potential Applications ◽

New Compounds

Abstract As the living standard improve, disposable sanitary and living paper requires not only softness or easy to fluff in a dry state, but also good antibacterial property. In this study, a series of alkyl quaternary ammonium salts (AQAS), a kinds of antibacterial-debonding agents, were synthesized by using a two-step process. The SN2 nucleophilic substitution reaction was designed between triethanolamine and sulfoxide chloride, and followed subsequent quaternization by tertiaryamines with different long alkyl chains. The obtained products can be used as an antibacterial and softening/debonding agent for improving the performance of paper or fluff pulp. The results showed that these new compounds can endow antibacterial function and high softness to paper or control appropriate burst strength to fluff pulp board. These AQAS products can be not only used in daily disposable sanitary products, but also have potential applications in other products such as glass spacer paper, advanced household paper, or antibacterial tissue products to prevent microbial contamination.

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Switchable acoustic metagrating for three-channel retroreflection and carpet cloaking

Applied Physics Express ◽

10.35848/1882-0786/ac481d ◽

2022 ◽

Author(s):

Ailing Song ◽

Chaoyu Sun ◽

Yanxun Xiang ◽

Fu-Zhen Xuan

Keyword(s):

Theoretical Analysis ◽

Numerical Simulations ◽

Acoustic Communication ◽

Simple Structure ◽

Research Work ◽

Simple Method ◽

Acoustic Sensing ◽

Reflected Wave ◽

Diffracted Waves ◽

Potential Applications

Abstract In this paper, we propose a switchable acoustic metagrating composed of periodic grooves for realizing switchable functionalities of three-channel retroreflection and carpet cloaking. The groove parameters are determined by calculating and analyzing the reflectance of different diffracted waves, and only one propagating reflected wave is allowed. Theoretical analysis and numerical simulations are performed to validate the three-channel retroreflection and carpet cloaking performances of the proposed metagrating. Our research work provides a practical and simple method to design acoustic devices with switchable functionalities and simple structure, and has potential applications in practical fields of acoustic sensing and acoustic communication.

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Synthesis of Hollow ß-Phase GeO2 in Microemulsion

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.669.360 ◽

2013 ◽

Vol 669 ◽

pp. 360-365

Author(s):

Xu Zou ◽

Bing Bing Liu ◽

Wei Wu ◽

Dong Mei Li ◽

Quan Jun Li ◽

...

Keyword(s):

Optical Properties ◽

Ostwald Ripening ◽

Hollow Structure ◽

Simple Method ◽

Light Emitting ◽

Hollow Interior ◽

Potential Applications ◽

One Step ◽

Average Size ◽

20 Nm

We fabricated mono-dispersed hollow waxberry shaped ß-quartz GeO2by a facile one-step synthesis in emulsion at room temperature. TEM images indicated that hollow waxberry shaped GeO2were consisted of nano-sphere whose average size were estimated to be 20 nm. The growth mechanism and optical properties of the products were also investigated. The possible formation mechanism of the hollow interior is proposed as the Ostwald ripening. The optical properties of the ß-GeO2nanoparticles with hollow shapes were also studied with photoluminescence spectrum, which reveals a broad emission, suggesting potential applications in electronic and optoelectronic nanodevices. These attractive results provide us a new simple method further used to fabricate other specific hollow structure and indicate hollow waxberry shaped GeO2may have potential applications in light-emitting nanodevices.

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