Conformational Studies of Covalently Grafted Poly(ethylene glycol) on Modified Solid Matrices Using X-ray Photoelectron Spectroscopy

Langmuir ◽  
2010 ◽  
Vol 26 (10) ◽  
pp. 7299-7306 ◽  
Author(s):  
Vinod Babu Damodaran ◽  
Conan J. Fee ◽  
Tim Ruckh ◽  
Ketul C. Popat
Keyword(s):  
Ethylene Glycol ◽  
Photoelectron Spectroscopy ◽  
Poly Ethylene Glycol ◽  
Conformational Studies ◽  
X Ray ◽  
Solid Matrices ◽  
Poly Ethylene

scholarly journals Chemical Synthesis and Characterization of Poly(poly(ethylene glycol) methacrylate)-Grafted CdTe Nanocrystals via RAFT Polymerization for Covalent Immobilization of Adenosine

Polymers ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 77 ◽  
Author(s):  
Trinh Duy Nguyen ◽  
Hieu Vu-Quang ◽  
Thanh Sang Vo ◽  
Duy Chinh Nguyen ◽  
Dai-Viet N. Vo ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Photoelectron Spectroscopy ◽  
Raft Polymerization ◽  
Condensation Reaction ◽  
Covalent Bond ◽  
Poly Ethylene Glycol ◽  
X Ray ◽  
Glycol Methacrylate ◽  
Cdte Qds ◽  
Poly Ethylene

This paper describes the functionalization of poly(poly(ethylene glycol) methacrylate) (PPEGMA)-grafted CdTe (PPEGMA-g-CdTe) quantum dots (QDs) via surface-initiated reversible addition–fragmentation chain transfer (SI-RAFT) polymerization for immobilization of adenosine. Initially, the hydroxyl-coated CdTe QDs, synthesized using 2-mercaptoethanol (ME) as a capping agent, were coupled with a RAFT agent, S-benzyl S′-trimethoxysilylpropyltrithiocarbonate (BTPT), through a condensation reaction. Then, 2,2′-azobisisobutyronitrile (AIBN) was used to successfully initiate in situ RAFT polymerization to generate PPEGMA-g-CdTe nanocomposites. Adenosine-above-PPEGMA-grafted CdTe (Ado-i-PPEGMA-g-CdTe) hybrids were formed by the polymer shell, which had successfully undergone bioconjugation and postfunctionalization by adenosine (as a nucleoside). Fourier transform infrared (FT-IR) spectrophotometry, energy-dispersive X-ray (EDX) spectroscopy, thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy results indicated that a robust covalent bond was created between the organic PPEGMA part, cadmium telluride (CdTe) QDs, and the adenosine conjugate. The optical properties of the PPEGMA-g-CdTe and Ado-i-PPEGMA-g-CdTe hybrids were investigated by photoluminescence (PL) spectroscopy, and the results suggest that they have a great potential for application as optimal materials in biomedicine.

Immobilization of Poly(Ethylene Glycol) Terminated with Amine to Titanium Surface by Electrodeposition

2006 ◽  
Vol 15-17 ◽  
pp. 205-208
Author(s):  
Yuta Tanaka ◽  
Hisashi Doi ◽  
Yasuhiko Iwasaki ◽  
T. Yoneyama ◽  
Takao Hanawa
Keyword(s):  
Ethylene Glycol ◽  
Photoelectron Spectroscopy ◽  
Titanium Surface ◽  
Blood Compatibility ◽  
Poly Ethylene Glycol ◽  
X Ray ◽  
Artificial Blood Vessels ◽  
The Difference ◽  
Poly Ethylene ◽  
Convenient Technique

In many applications such as catheters, artificial blood vessels and diagnostic sensors, blood compatibility or prevention of adhesion of platelet is required. The preferred way to control these purposes is to eliminate or drastically reduce the adsorption of proteins. Surface modification with Poly(ethylene glycol), PEG has long been known to reduce undesirable protein adsorption. No technique for the immobilization of PEG to base metal has been developed. In this study, PEG terminated at both terminals or one terminal with amine bases was immobilized onto titanium surface by immersion or electrodeposition. The bonding manners of PEG onto titanium, which involve directionality of terminated amines and chemical bonding states of interface between the deposited PEG layer and TiO2, were characterized using X-ray photoelectron spectroscopy, XPS. As a result, terminated amines locate inside of the PEG layer and combine mainly with TiO2 as stable NHO by electrodeposition, while amines randomly exist and show mainly unstable bonding with TiO2 by immersion. Moreover, the difference of amine termination leads to different bonding manners, U-shape in PEG terminated both terminals and brush in PEG terminated one terminal. This immobilization process is one-stage convenient technique and useful for all electroconductive and morphological materials.

Establishing Chemical Bond Layer of Poly(Ethylene Glycol) on NiTi Alloy Surface

2013 ◽  
Vol 785-786 ◽  
pp. 578-581
Author(s):  
Hong Yan Yu ◽  
Lian Cai Wang ◽  
Yan Li ◽  
Xin Miao Zeng ◽  
Xin Qing Zhao
Keyword(s):  
Ethylene Glycol ◽  
Photoelectron Spectroscopy ◽  
Niti Alloy ◽  
Covalent Bond ◽  
Niti Shape Memory Alloy ◽  
Poly Ethylene Glycol ◽  
Γ Irradiation ◽  
Piranha Solution ◽  
Bond Layer ◽  
Poly Ethylene

To get bioorganic surface with improving biological properties, NiTi shape memory alloy was bonded poly (ethylene glycol) (PEG) by sequentially piranha solution treating, silanizing, and then γ-ray irradiation induced grafting. Piranha solution treating gave hydroxylated surfaces for the benefit of next silanization. The trichlorovinylsilane (TCVS) was performed as a bridge to covalent bond treated NiTi substrates and PEG by γ-irradiation. X-ray photoelectron spectroscopy (XPS) was used to indicate that PEG was bonded on silanized NiTi surface by irradiation. Osteoblast culture of 1 day and methyl-thiazol-tetrazolium (MTT) assay showed that PEG bonded on NiTi surface enhanced cell proliferation and cell amount increased significantly with increasing the concentration of bonded PEG.

Biofunctionalization of Metal Surface by Immobilization of Poly(Ethylene Glycol) Terminated Amine

2007 ◽  
Vol 26-28 ◽  
pp. 765-768
Author(s):  
Yuta Tanaka ◽  
Yuh Matsuo ◽  
Haruka Saito ◽  
Yusuke Tsutsumi ◽  
Hisashi Doi ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Metal Surface ◽  
Photoelectron Spectroscopy ◽  
Blood Compatibility ◽  
Pure Titanium ◽  
Hydroxyl Groups ◽  
Commercially Pure Titanium ◽  
Cobalt Chromium ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene

In many biomedical devices such as catheters and diagnostic sensors, blood compatibility is required. The best way to control this property is to prevent or drastically reduce the adsorption of proteins. Poly(ethylene glycol) terminated amine at both terminals, NH2-PEG-NH2, is immobilized on a commercially pure titanium, a 316L austenitic stainless steel, and a cobalt-chromium-molybdenum alloy with immersion or electrodeposition. Chemical bonding states at the interface and orientation of PEG molecules were characterized using X-ray photoelectron spectroscopy, glow discharge optical emission spectroscopy, and Fourie-transformed infrared spectrometer with a reflection absorption spectrometer. As a result, NH2-PEG-NH2 was immobilized onto metal surface as a U-shape mainly with stable NHO bonding in electrodeposition. In the case of electrodepostion, the concentration of active surface hydroxyl groups on surface oxide film played an important role in the immobilization.

X-ray imaging technique using colloid solution of Au/silica/poly(ethylene glycol) nanoparticles

2013 ◽  
Vol 17 (7) ◽  
pp. 507-514 ◽  
Author(s):  
Y. Kobayashi ◽  
H. Inose ◽  
R. Nagasu ◽  
T. Nakagawa ◽  
Y. Kubota ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Imaging Technique ◽  
Colloid Solution ◽  
Poly Ethylene Glycol ◽  
X Ray ◽  
X Ray Imaging ◽  
Poly Ethylene

scholarly journals X-Ray Imaging of Poly(Ethylene Glycol) Hydrogels Without Contrast Agents

2010 ◽  
Vol 16 (6) ◽  
pp. 1597-1600 ◽  
Author(s):  
Eric M. Brey ◽  
Alyssa Appel ◽  
Yu-Chieh Chiu ◽  
Zhong Zhong ◽  
Ming-Huei Cheng ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Contrast Agents ◽  
Poly Ethylene Glycol ◽  
X Ray ◽  
X Ray Imaging ◽  
Poly Ethylene
Sign in / Sign up

Export Citation Format

Share Document