Recent Research on Non-Lithographic Fabrication of Ni-Se Heterojunction Nanowires and Their Electrical Characterization | Chapter 2 | Recent Advances in Science and Technology Research Vol. 8

 In this paper, Ni-Se heterojunction nanowires are produced via the process of template-assisted electrodeposition. Scanning electron microscopy (SEM), Energy Dispersive X-Ray Spectroscopy (EDS), X-ray diffractometry and electrical transport studies characterise nanowires. The uniform and dense growth of Ni-Se nanowires is revealed by SEM photographs. The crystalline nature of Ni-Se nanowires is shown by the pattern of X-ray diffraction. The much higher proportion of Ni compared to Se is demonstrated by the EDS spectrum. The resonant tunnelling diodes (RTDs) illustrate a collective current-voltage characteristic of heterojunction nanowires as a conduct with a peak to valley current ratio of 1.37 at room temperature. This technique is ideal for synthesising the desired diameter and duration of mono dispersive nanowires. Peak current, which is a significant feature, is observed at low voltage and provides the possibility of creating electronic devices with low power dissipation.

Author(s) Details

Kanchan Kumari

Department of Electronics and Communication Engineering, Punjab Technical University/ BBSBEC, Fatehgarh Sahib, Punjab, India.

Vijay Kumar
Department of Material Science and Engineering, Punjab Technical University/ PCET, Lalru Mandi, Punjab, India.

Karamjeet Singh
Department of Electronics and Communication Engineering, Punjab Technical University/ BBSBEC, Fatehgarh Sahib, Punjab, India.

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Advanced Study on Preparation, Physical-Chemical Characterization, and Cytocompatibility of Polymeric Calcium Phosphate Cements | Chapter 14 | Current Topics in Medicine and Medical Research Vol. 9

 

Background: Much attention has recently been paid to calcium phosphate cements (CPCs) because of their advantages in terms of in situ handling and forming capabilities compared to calcium phosphate bioceramics. Mechanical and in vitro biological physicochemical properties of novel polymeric calcium phosphate cement (CPC) formulations have been investigated.
Methods: to obtain Forms I, II and III CPCs, monocalcium phosphate, calcium oxide and synthetic hydroxyapatite were mixed either with modified polyacrylic acid, light activated polyalkenoic acid or with polymethyl vinyl ether maleic acid. CPCs were compared with zinc polycarboxylate cement (control) setting time, compressive and diametric strength. X-ray diffraction, scanning electron microscopy, and infrared spectroscopy were used to identify specimens. CPCs and control were tested for in vitro cytotoxicity.
Results: Hydroxyapatite, monetite, and brushite were seen by X-ray diffraction analysis. The presence of stretching peaks in the IR spectra of set cements confirmed the acid-base reaction. Rod-like crystals and platy crystals were disclosed by SEM. The cement setting time was 5-12 min. Compared with power, type III showed significantly higher strength values. High biocompatibility was achieved in type III.
Conclusions: In comparison to zinc polycarboxylate cement (control group), Type III CPC displayed acceptable setting time, substantially higher compressive, and diametral tensile strengths. For dental applications, Type III CPCs show promise.

Author(s) Details


Rania M. Khashaba
Department Oral Biology, Medical College of Georgia, Augusta, GA 30912-1129, USA., Department Orthopaedic Surgery, Section of Biomaterials, Medical College of Georgia, Augusta, GA 30912-1129, USA. and Department of Dental Materials, Misr International University (MIU), Cairo 11787, Egypt.

Mervet Moussa
Department of Oral Pathology, Cairo University, Cairo 11559, Egypt. and Department of Oral Pathology, Misr International University (MIU), Cairo 11787, Egypt.

Christopher Koch
Department Orthopaedic Surgery, Section of Biomaterials, Medical College of Georgia, Augusta, GA 30912-1129, USA.

Arthur R. Jurgensen
Savannah River National Laboratory, Savannah River Nuclear Solutions, Aiken, SC 29808, USA.

David M. Missimer
Savannah River National Laboratory, Savannah River Nuclear Solutions, Aiken, SC 29808, USA.

Ronny L. Rutherford
Savannah River National Laboratory, Savannah River Nuclear Solutions, Aiken, SC 29808, USA.

Norman B. Chutkan
Department Orthopaedic Surgery, Section of Biomaterials, Medical College of Georgia, Augusta, GA 30912-1129, USA.

James L. Borke

Department Oral Biology, Medical College of Georgia, Augusta, GA 30912-1129, USA and Department Orthopaedic Surgery, Section of Biomaterials, Medical College of Georgia, Augusta, GA 30912-1129, USA.

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