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1 – 3 of 3Mohammed Gamil, Nagih M. Shaalan and Ahmed Abd El-Moneim
This study aims to present an efficient and reliable graphene nanoplatelets (GNPs)-based temperature sensor.
Abstract
Purpose
This study aims to present an efficient and reliable graphene nanoplatelets (GNPs)-based temperature sensor.
Design/methodology/approach
A high-quality dispersion of GNPs was dropped by casting method on platinum electrodes deposited on a polyethylene terephthalate (PET) substrate. The GNPs were characterized by scanning electron microscope, Raman spectroscopy and X-ray diffraction spectra to ensure its purity and quality. The temperature sensing behavior of the fabricated sensor was examined by subjecting it to different temperatures, range from room temperature (RT) to 150 °C.
Findings
Excellent resistance linearity with temperature change was achieved. Temperature coefficient of resistance of the fabricated sensor was calculated as 1.4 × 10–3°C. The sensor also showed excellent repeatability and stability for the measured temperature range. Good response and recovery times were evaluated at all the measured temperatures. With measuring the sensor response, the ambient temperature can be determined.
Originality/value
The present work presents a new simply and low cost fabricated temperature sensor based on GNPs working at a wide temperature range.
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Keywords
Sahour Sayed, Mohammed Gamil, Ahmed Fath El-Bab, Koichi Nakamura, Toshiyuki Tsuchiya, Osamu Tabata and Ahmed Abd El-Moneim
The purpose of this paper is to develop a new simple technique to synthesize graphene film on a flexible polyethylene terephthalate (PET) substrate and applied as a strain sensor.
Abstract
Purpose
The purpose of this paper is to develop a new simple technique to synthesize graphene film on a flexible polyethylene terephthalate (PET) substrate and applied as a strain sensor.
Design/methodology/approach
Graphene film was synthesized using laser treatment of graphene oxide (GO) film deposited on PET substrate. A universal laser system was used to simultaneously reduce and pattern the GO film into laser reduced graphene oxide (LRGO) film.
Findings
The laser treatment synthesizes a multilayer graphene film with overlapped flakes, which shows structure integrity, mechanical flexibility and electrical conductivity of 1,330 S/m. The developed LRGO/PET film was used to fabricate a high sensitivity strain sensor. The sensitivity and temperature dependency of its gauge factor (GF) was examined at applied strains up to 0.25 per cent and operating temperatures up to 80°C. The fabricated sensor shows stable GF of approximately 78 up to 60°C with standard error of the mean not exceeding approximately ± 0.2.
Originality/value
The proposed method offers a new simple and productive technique of fabricating large-scale graphene-based flexible devices at a low cost.
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Keywords
Mukaram Ali Khan, Jeetesh Kumar, Muhammad Haroon Shoukat and Kareem M. Selem
This paper aims to explore the role of perceived organizational injustice (POI) leading to workplace conflict in determining organizational performance (OP) among healthcare…
Abstract
Purpose
This paper aims to explore the role of perceived organizational injustice (POI) leading to workplace conflict in determining organizational performance (OP) among healthcare employees. This paper also examines the serial mediating effects of moral disengagement (MD) and knowledge hiding (KH).
Design/methodology/approach
In all, 244 public and private hospital employees in Pakistan provided the data set.
Findings
According to partial least squares-structural equation modeling findings, the negative association between POI and OP was serially mediated by KH and MD. The recovery process underlying the linkage between POI and OP is tested and highlighted in this paper as a first step in unraveling it.
Research limitations/implications
The findings highlight the significance of taking moral and KH models into account when attempting to understand the moral cognitive processes that employees go through when they see injustice. Organizations should guarantee the equitable distribution of incentives and resources, as distributive and procedural justices are concerned with organizations.
Originality/value
By directing actions meant to prevent MD and KH, the findings may potentially inspire new, more focused treatments to safeguard patient safety and avoid losses in the healthcare industry. One way to reduce unethical conduct and MD is to have people declare or agree to a code of ethics.
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