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.

Magnetic Liquid Marbles: Manipulation of Liquid Droplets Using Highly Hydrophobic Fe3O4Nanoparticles

2010 ◽  
Vol 22 (6) ◽  
pp. 707-710 ◽  
Author(s):  
Yan Zhao ◽  
Jian Fang ◽  
Hongxia Wang ◽  
Xungai Wang ◽  
Tong Lin
Keyword(s):  
Liquid Droplets ◽  
Magnetic Liquid ◽  
Liquid Marbles ◽  
Highly Hydrophobic

Properties and Applications of Modified Bacterial Cellulose-Based Materials

2020 ◽  
Vol 16 ◽  
Author(s):  
Munair Badshah ◽  
Hanif Ullah ◽  
Fazli Wahid ◽  
Taous Khan
Keyword(s):  
Surface Modification ◽  
Bacterial Cellulose ◽  
Degree Of Polymerization ◽  
Biomedical Science ◽  
Hydroxyl Groups ◽  
Market Demand ◽  
Ideal Candidate ◽  
Fibrous Network ◽  
Potential Applications ◽  
Surface Modification Techniques

Background: Bacterial cellulose (BC) is purest form of cellulose as it is free from pactin, lignin, hemicellulose and other active constituents associated with cellulose derived from plant sources. High biocompatibility and easy molding into desired shape make BC an ideal candidate for applications in biomedical field such as tissue engineering, wound healing and bone regeneration. In addition to this, BC has been widely studied for applications in the delivery of proteins and drugs in various forms via different routes. However, BC lacks therapeutic properties and resistance to free movement of small molecules i.e., gases and solvents. Therefore, modification of BC is required to meet the research ad market demand. Methods: We have searched the updated data relevant to as-synthesized and modified BC, properties and applications in various fields using Web of science, Science direct, Google and PubMed. Results: As-synthesized BC possesses properties such as high crystallinity, well organized fibrous network, higher degree of polymerization, and ability of being produced in swollen form. The large surface area with abundance of free accessible hydroxyl groups makes BC an ideal candidate for carrying out surface functionalization to enhance its features. The various reported surface modification techniques including, but not limited to, are amination, methylation and acetylation. Conclusion: In this review, we have highlighted various approaches made for BC surface modification. We have also reported enhancement in the properties of modified BC and potential applications in different fields ranging from biomedical science to drug delivery and paper-making to various electronic devices.

scholarly journals Osseointegration Improvement of Co-Cr-Mo Alloy Produced by Additive Manufacturing

Pharmaceutics ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 724
Author(s):  
Amilton Iatecola ◽  
Guilherme Arthur Longhitano ◽  
Luiz Henrique Martinez Antunes ◽  
André Luiz Jardini ◽  
Emilio de Castro Miguel ◽  
...  
Keyword(s):  
Surface Modification ◽  
Additive Manufacturing ◽  
Bone Ingrowth ◽  
Orthopedic Implants ◽  
Coated Sample ◽  
High Mechanical Strength ◽  
Coated Surface ◽  
Surface Modification Techniques ◽  
Almost All ◽  
Cobalt Base

Cobalt-base alloys (Co-Cr-Mo) are widely employed in dentistry and orthopedic implants due to their biocompatibility, high mechanical strength and wear resistance. The osseointegration of implants can be improved by surface modification techniques. However, complex geometries obtained by additive manufacturing (AM) limits the efficiency of mechanical-based surface modification techniques. Therefore, plasma immersion ion implantation (PIII) is the best alternative, creating nanotopography even in complex structures. In the present study, we report the osseointegration results in three conditions of the additively manufactured Co-Cr-Mo alloy: (i) as-built, (ii) after PIII, and (iii) coated with titanium (Ti) followed by PIII. The metallic samples were designed with a solid half and a porous half to observe the bone ingrowth in different surfaces. Our results revealed that all conditions presented cortical bone formation. The titanium-coated sample exhibited the best biomechanical results, which was attributed to the higher bone ingrowth percentage with almost all medullary canals filled with neoformed bone and the pores of the implant filled and surrounded by bone ingrowth. It was concluded that the metal alloys produced for AM are biocompatible and stimulate bone neoformation, especially when the Co-28Cr-6Mo alloy with a Ti-coated surface, nanostructured and anodized by PIII is used, whose technology has been shown to increase the osseointegration capacity of this implant.

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.

Palygorskite@Fe3O4@polyperfluoroalkylsilane nanocomposites for superoleophobic coatings and magnetic liquid marbles

2016 ◽  
Vol 4 (16) ◽  
pp. 5859-5868 ◽  
Author(s):  
Lingxiao Li ◽  
Bucheng Li ◽  
Ling Fan ◽  
Bin Mu ◽  
Aiqin Wang ◽  
...  
Keyword(s):  
Magnetic Liquid ◽  
Liquid Marbles

Magnetic palygorskite@Fe3O4@polyperfluoroalkylsilane nanocomposites were prepared, which can be used for fabricating superoleophobic coatings and magnetic liquid marbles.

scholarly journals Review of titanium surface modification techniques and coatings for antibacterial applications

2019 ◽  
Vol 83 ◽  
pp. 37-54 ◽  
Author(s):  
H. Chouirfa ◽  
H. Bouloussa ◽  
V. Migonney ◽  
C. Falentin-Daudré
Keyword(s):  
Surface Modification ◽  
Titanium Surface ◽  
Surface Modification Techniques

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.

scholarly journals Removal of Organic Dyes from Aqueous Solutions with Surfactant-Modified Magnetic Nanoparticles

2014 ◽  
Vol 16 (2) ◽  
pp. 27-30 ◽  
Author(s):  
Katarzyna Wybieralska ◽  
Anna Wajda
Keyword(s):  
Surface Modification ◽  
Iron Oxide ◽  
Magnetic Nanoparticles ◽  
Aqueous Solutions ◽  
Organic Dyes ◽  
Iron Hydroxide ◽  
Colloidal Solutions ◽  
Spectrophotometric Methods ◽  
Production Water ◽  
Modified Magnetic Nanoparticles

Abstract The paper presents the results of studies on the possibility of using magnetic nanoparticles modified with selected hydrophobic surfactants for model post-production water purification. Colloidal solutions of iron hydroxide (III) and iron oxide (II and III) were obtained and their particles were subjected to surface modification using surfactants. Thus obtained magnetic fluids were used as active agents in the process of removing selected organic dyes from their aqueous solutions. The effectiveness of the modified compounds was analysed using spectrophotometric methods. It has been shown that the effectiveness of the process depends on the type of surfactant used to modify selected magnetic nanoparticles.

Near-Infrared Emitting Dual-Stimuli-Responsive Carbon Dots from Endogenous Bile Pigments

Nanoscale ◽  
2021 ◽  
Author(s):  
Parinaz Fathi ◽  
Parikshit Moitra ◽  
Madeleine M. McDonald ◽  
Mandy Brigitte Esch ◽  
Dipanjan Pan
Keyword(s):  
Surface Modification ◽  
Carbon Dots ◽  
Biomedical Applications ◽  
Near Infrared ◽  
Bile Pigments ◽  
Careful Selection ◽  
Stimuli Responsive ◽  
Carbon Dot ◽  
Surface Modification Techniques ◽  
Selection Of

Carbon dots are biocompatible nanoparticles suitable for a variety of biomedical applications. Careful selection of carbon dot precursors and surface modification techniques has allowed for the development of carbon dots...

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