PMID- 35540168
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20231102
IS  - 2046-2069 (Electronic)
IS  - 2046-2069 (Linking)
VI  - 8
IP  - 41
DP  - 2018 Jun 21
TI  - Surface modification of CoCr alloys by electrochemical reduction of diazonium 
      salts.
PG  - 23191-23198
LID - 10.1039/c8ra02634c [doi]
AB  - Tailoring the surface chemistry of CoCr alloys is of tremendous interest in many 
      biomedical applications. In this work, we show that CoCr can be modified by 
      diazonium electrografting provided the surface is not homogeneously covered with 
      an oxide layer. Cyclic voltammetry (CV) and X-ray photoelectron spectroscopy 
      (XPS) show the electrografting of a poly(aminophenylene) (PAP) layer on CoCr when 
      treated at a reductive potential (CoCr(-0.5 V)), whereas no PAP film was formed 
      on CoCr(OCP) and CoCr(1 V), treated at open circuit and anodic potentials 
      respectively. Based on XPS results, we attributed the electrografting to the 
      formation of carbide bonds between PAP and the inhomogeneous thin oxide layer of 
      CoCr(-0.5 V). We then show an example of application of PAP coatings on CoCr and 
      prove that the presence of a PAP coating on CoCr(-0.5 V) results in a 5-fold 
      increase of the adherence of poly methyl methacrylate (PMMA) to PAP-coated CoCr 
      compared to uncoated samples; this is of prime significance to improving the 
      long-term stability of dental prostheses. These findings support the importance 
      of reducing the oxide layer for effective functionalization of metal oxides with 
      aryl diazonium salts and suggest a promising surface modification approach for 
      biomedical applications.
CI  - This journal is (c) The Royal Society of Chemistry.
FAU - Mezour, M A
AU  - Mezour MA
AD  - Department of Mining and Materials Engineering, McGill University Montreal Quebec 
      H3A 2B2 Canada.
AD  - Faculty of Dentistry, McGill University, 3640, Strathcona Anatomy and Dentistry 
      Building, Rue University Montreal Quebec H3A 0C7 Canada marta.cerruti@mcgill.ca.
FAU - Oweis, Y
AU  - Oweis Y
AD  - Faculty of Dentistry, McGill University, 3640, Strathcona Anatomy and Dentistry 
      Building, Rue University Montreal Quebec H3A 0C7 Canada marta.cerruti@mcgill.ca.
FAU - El-Hadad, A A
AU  - El-Hadad AA
AD  - Faculty of Dentistry, McGill University, 3640, Strathcona Anatomy and Dentistry 
      Building, Rue University Montreal Quebec H3A 0C7 Canada marta.cerruti@mcgill.ca.
AD  - Physics Department, Faculty of Science, Al-Azhar University Nasr City Cairo 
      Egypt.
FAU - Algizani, S
AU  - Algizani S
AD  - Faculty of Dentistry, McGill University, 3640, Strathcona Anatomy and Dentistry 
      Building, Rue University Montreal Quebec H3A 0C7 Canada marta.cerruti@mcgill.ca.
FAU - Tamimi, F
AU  - Tamimi F
AD  - Faculty of Dentistry, McGill University, 3640, Strathcona Anatomy and Dentistry 
      Building, Rue University Montreal Quebec H3A 0C7 Canada marta.cerruti@mcgill.ca.
FAU - Cerruti, M
AU  - Cerruti M
AD  - Department of Mining and Materials Engineering, McGill University Montreal Quebec 
      H3A 2B2 Canada.
LA  - eng
PT  - Journal Article
DEP - 20180702
PL  - England
TA  - RSC Adv
JT  - RSC advances
JID - 101581657
PMC - PMC9081548
COIS- There are no conflicts of interest to declare.
EDAT- 2018/07/02 00:00
MHDA- 2018/07/02 00:01
PMCR- 2018/07/02
CRDT- 2022/05/11 03:53
PHST- 2018/03/27 00:00 [received]
PHST- 2018/04/05 00:00 [accepted]
PHST- 2022/05/11 03:53 [entrez]
PHST- 2018/07/02 00:00 [pubmed]
PHST- 2018/07/02 00:01 [medline]
PHST- 2018/07/02 00:00 [pmc-release]
AID - c8ra02634c [pii]
AID - 10.1039/c8ra02634c [doi]
PST - epublish
SO  - RSC Adv. 2018 Jul 2;8(41):23191-23198. doi: 10.1039/c8ra02634c. eCollection 2018 
      Jun 21.