Surface functionalization of coconut fibers by enzymatic biografting of syringaldehyde for the development of biocomposites

RSC Advances ◽  
2015 ◽  
Vol 5 (94) ◽  
pp. 76844-76851 ◽  
Author(s):  
Kamini Thakur ◽  
Susheel Kalia ◽  
B. S. Kaith ◽  
Deepak Pathania ◽  
Amit Kumar
Keyword(s):  
Surface Modification ◽  
Surface Functionalization ◽  
Reinforcing Material ◽  
Coconut Fibers

Surface modification of coconut fibers was carried out by laccase-assisted biografting of syringaldehyde for their use as reinforcing material in the preparation of biocomposites.

Mussel-inspired surface functionalization of porous carbon nanosheets using polydopamine and Fe3+/tannic acid layers for high-performance electrochemical capacitors

2017 ◽  
Vol 5 (48) ◽  
pp. 25368-25377 ◽  
Author(s):  
Yeong A. Lee ◽  
Jiyoung Lee ◽  
Dae Wook Kim ◽  
Chung-Yul Yoo ◽  
Sang Hyun Park ◽  
...  
Keyword(s):  
Surface Modification ◽  
Tannic Acid ◽  
Surface Functionalization ◽  
Porous Carbon ◽  
High Performance ◽  
Electrochemical Capacitors ◽  
Carbon Nanosheets

The mussel-inspired surface modification for high-performance electrochemical capacitors is demonstrated.

Preparation of PDMS ultrathin films and patterned surface modification with cellulose

RSC Advances ◽  
2014 ◽  
Vol 4 (23) ◽  
pp. 11955-11961 ◽  
Author(s):  
Matej Bračič ◽  
Tamilselvan Mohan ◽  
Rupert Kargl ◽  
Thomas Griesser ◽  
Silvo Hribernik ◽  
...  
Keyword(s):  
Surface Modification ◽  
Surface Functionalization ◽  
Ultrathin Films ◽  
Patterned Surface

Patterned surface functionalization of PDMS with the biopolymer cellulose via lithographic methods.

Surface Functionalization of Silicon MEMS Biochemical Sensors for the Detection of Foodborne Pathogens

2021 ◽  
Author(s):  
Md Ebrahim Khalil Bhuiyan ◽  
Dustin Smith ◽  
Eric J. Voss ◽  
Chin-Chuan Wei ◽  
Mohammad Shavezipur
Keyword(s):  
Surface Modification ◽  
Surface Functionalization ◽  
Foodborne Pathogens ◽  
Silicon Surface ◽  
Chemical Species ◽  
Biological Species ◽  
Dna Aptamer ◽  
Native Oxide ◽  
Sensor Surface ◽  
E Coli

Abstract This work presents the surface modification of silicon chips as a platform for silicon-based biosensors with applications aiming for the detection of foodborne bacteria in aqueous solution. The detection requires high selectivity as the solution may contain a variety of biological species, which affect the outcome of the sensing process. The silicon surface is functionalized by a self-assembled monolayer (SAM) with thiol groups followed by immobilizing a thiol-linked DNA aptamer. The DNA aptamer used in this work has reported to recognize a biological species, E. coli ATCC 25922. The presence of DNA aptamer on the sensor surface allows the capture of the specific E. coli cells on the surface, while other potential biological (and chemical) species would not attach to the sensor surface, thus improving the selectivity of the sensor. The uniform formation of the SAM on the surface is an important step toward uniformly coating the sensor surface with the desired DNA aptamer. The SAM is created on the silicon surface by surface modification with the MPTS (3-mercaptopropyl trimethoxy silane) solution. Then the aptamer DNA solution is applied as droplets on the chip followed by a cure process. The attachment of the SAM and DNA aptamers are verified by atomic force microscopy (AFM). The surface functionalization presented in this work can be used for sensors made of silicon coated with a thin layer of native oxide, and can be adopted for detection of other cells and biological agents using the proper SAM and DNA aptamer.

Surface Functionalization and Magnetic Motion of Hydrophobic Magnetic Nanoparticles with Different Sizes

2015 ◽  
Vol 13 (1) ◽  
pp. 113-118 ◽  
Author(s):  
Fagen Li ◽  
Wei Wu ◽  
Aifeng Ning ◽  
Jun Wang
Keyword(s):  
Surface Modification ◽  
Magnetic Nanoparticles ◽  
Surface Functionalization ◽  
General Strategy ◽  
Magnetic Liquid ◽  
Mechanical Method ◽  
Hydrophobic Properties ◽  
Liquid Marbles ◽  
Surface Modification Techniques ◽  
Highly Hydrophobic

Abstract A facile and general strategy was successfully developed for the surface modification of hydrophobic Fe3O4 magnetic nanoparticles with various sizes (4–17 nm). The results show that the magnetic and hydrophobic properties are sensitive to the nanoparticle size. For example, the contact angle (CA) of the sample increases as the particle size increases. Using these surface modification techniques allowed the coating of water droplets with highly hydrophobic Fe3O4 nanoparticles to form magnetic liquid marbles through a mechanical method. The behavior of these liquid marbles under the action of a magnetic field revealed that their potential value in electronic, biomedical, self-cleaning, and biochemical applications.

scholarly journals Surface Modification of Fluorescent Nanodiamonds for Biological Applications

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 153
Author(s):  
Hak-Sung Jung ◽  
Keir C. Neuman
Keyword(s):  
Surface Modification ◽  
Surface Functionalization ◽  
Biomedical Applications ◽  
Carbon Nanomaterials ◽  
Cell Labeling ◽  
Great Promise ◽  
Biological Applications ◽  
Homogeneous Surface ◽  
New Class ◽  
Fluorescent Nanodiamonds

Fluorescent nanodiamonds (FNDs) are a new class of carbon nanomaterials that offer great promise for biological applications such as cell labeling, imaging, and sensing due to their exceptional optical properties and biocompatibility. Implementation of these applications requires reliable and precise surface functionalization. Although diamonds are generally considered inert, they typically possess diverse surface groups that permit a range of different functionalization strategies. This review provides an overview of nanodiamond surface functionalization methods including homogeneous surface termination approaches (hydrogenation, halogenation, amination, oxidation, and reduction), in addition to covalent and non-covalent surface modification with different functional moieties. Furthermore, the subsequent coupling of biomolecules onto functionalized nanodiamonds is reviewed. Finally, biomedical applications of nanodiamonds are discussed in the context of functionalization.

scholarly journals Production and Surface Modification of Cellulose Bioproducts

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3433
Author(s):  
Sumedha Liyanage ◽  
Sanjit Acharya ◽  
Prakash Parajuli ◽  
Julia L. Shamshina ◽  
Noureddine Abidi
Keyword(s):  
Surface Modification ◽  
Surface Functionalization ◽  
Chemical Vapor ◽  
Atomic Layer ◽  
Natural State ◽  
Health And Environmental Effects ◽  
Cellulosic Materials ◽  
Judicious Choice ◽  
End Use ◽  
Novel Applications

Petroleum-based synthetic plastics play an important role in our life. As the detrimental health and environmental effects of synthetic plastics continue to increase, the renewable, degradable and recyclable properties of cellulose make subsequent products the “preferred environmentally friendly” alternatives, with a small carbon footprint. Despite the fact that the bioplastic industry is growing rapidly with many innovative discoveries, cellulose-based bioproducts in their natural state face challenges in replacing synthetic plastics. These challenges include scalability issues, high cost of production, and most importantly, limited functionality of cellulosic materials. However, in order for cellulosic materials to be able to compete with synthetic plastics, they must possess properties adequate for the end use and meet performance expectations. In this regard, surface modification of pre-made cellulosic materials preserves the chemical profile of cellulose, its mechanical properties, and biodegradability, while diversifying its possible applications. The review covers numerous techniques for surface functionalization of materials prepared from cellulose such as plasma treatment, surface grafting (including RDRP methods), and chemical vapor and atomic layer deposition techniques. The review also highlights purposeful development of new cellulosic architectures and their utilization, with a specific focus on cellulosic hydrogels, aerogels, beads, membranes, and nanomaterials. The judicious choice of material architecture combined with a specific surface functionalization method will allow us to take full advantage of the polymer’s biocompatibility and biodegradability and improve existing and target novel applications of cellulose, such as proteins and antibodies immobilization, enantiomers separation, and composites preparation.

scholarly journals Probing the potential of structured and surface functionalized tools for dry cold forging of aluminium

2018 ◽  
Vol 190 ◽  
pp. 14010
Author(s):  
Marco Teller ◽  
Ingo Ross ◽  
Stephan Prünte ◽  
André Temmler ◽  
Moritz Küpper ◽  
...  
Keyword(s):  
Surface Modification ◽  
Tool Steel ◽  
Surface Functionalization ◽  
Friction And Wear ◽  
Steel Surface ◽  
Cold Forging ◽  
Wear Behaviour ◽  
Main Task ◽  
Cold Forming ◽  
Structured Surfaces

In order to reduce friction and wear in cold forging of aluminium and its alloys a tremendous amount of lubricants is used. The main task of the liquid lubricants is the separation of tool and workpiece surfaces to avoid adhesion and abrasion. From an ecological and economical point of view, a reduction of the consumption of lubricants is meaningful. Novel surface modification techniques have been investigated to enable dry cold forming. In previous work, a reduced wear by adhesion of aluminium to an AISI H11 ESR tool steel surface was detected for a combination of laser polishing and a subsequent surface functionalization. Here, structured surfaces combined with surface functionalization are investigated regarding their wear behaviour. Therefore, different structures are realized on AISI H11 ESR tool steel surfaces by laser structuring. These structures are aligned parallel and perpendicular to the material flow direction. Furthermore, different structure depths are generated. It is evident that the laser induced surface melting causes both, a reduced micro roughness as well as a homogenized elementary distribution. Moreover, the surfaces are functionalized with an octadecylphosphonic acid selfassembled monolayer (C18PA-SAM). The SAM’s distal alkyl termini functionalize the tool steel surface und thus only weak van-der-Waals interactions are present in the aluminium-tool steel interface rendering an interaction, which is expected to be similar to the interaction in conventionally lubricated aluminium forming. Finally, the surfaces are appraised regarding their wear behaviour in a compression-torsion-wear tribometer. The different experimental results document the potential of the here investigated combined tool surface modification. Although, the performance of a lubricated process is not completely reached a reduction in friction and wear can be achieved compared to unmodified tools.

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