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Article
Publication date: 23 August 2022

Shireen Mohammed Abed, Sabah M. Mohammad, Zainuriah Hassan, Aminu Muhammad and Suvindraj Rajamanickam

The purpose of this study is to fabricate an ultraviolet (UV) metal-semiconductor-metal (MSM) photodetector based on zinc oxide nanorods (ZnO NRs) grown on seeded silicon…

Abstract

Purpose

The purpose of this study is to fabricate an ultraviolet (UV) metal-semiconductor-metal (MSM) photodetector based on zinc oxide nanorods (ZnO NRs) grown on seeded silicon (Si) substrate that was prepared by a low-cost method (drop-casting technique).

Design/methodology/approach

The drop-casting method was used for the seed layer deposition, the hydrothermal method was used for the growth of ZnO NRs and subsequent fabrication of UV MSM photodetector was done using the direct current sputtering technique. The performance of the fabricated MSM devices was investigated by current–voltage (I–V) measurements. The photodetection mechanism of the fabricated device was discussed.

Findings

Semi-vertically high-density ZnO (NRs) were effectively produced with a preferential orientation along the (002) direction, and increased crystallinity is confirmed by X-ray diffraction analysis. Photoluminescence results show a high UV region. The fabricated MSM UV photodetector showed that the ZnO (NRs) MSM device has great stability over time, high photocurrent, good sensitivity and high responsivity under 365 nm wavelength illumination and 0 V, 1 V, 2 V and 3 V applied bias. The responsivity and sensitivity for the fabricated ZnO NRs UV photodetector are 0.015 A W-1, 0.383 A W-1, 1.290 A W-1 and 1.982 A W-1 and 15,030, 42.639, 100.173 and 334.029, respectively, under UV light (365 nm) illumination at (0 V, 1 V, 2 V and 3 V).

Originality/value

This paper uses the drop-casting technique and the hydrothermal method as simple and low-cost methods to fabricate and improve the ZnO NRs photodetector.

Details

Microelectronics International, vol. 40 no. 1
Type: Research Article
ISSN: 1356-5362

Keywords

Article
Publication date: 14 June 2022

Aminu Muhammad, Sabah M. Mohammad, Zainuriah Hassan, Suvindraj Rajamanickam, Shireen Mohammed Abed and M.G.B. Ashiq

The purpose of this study is to dope silver (Ag) and fluorine (F) in zinc oxide (ZnO) for the enhancement of electrical and optical properties of ZnO, as previous studies…

Abstract

Purpose

The purpose of this study is to dope silver (Ag) and fluorine (F) in zinc oxide (ZnO) for the enhancement of electrical and optical properties of ZnO, as previous studies reported the improvement of these properties using individual doping of F and Ag. In this paper, F and Ag co-doped ZnO nanorods were synthesized using a modified hydrothermal method.

Design/methodology/approach

The hydrothermal method was modified and used for the synthesis of the doped ZnO nanostructures, where stainless autoclave and oven were replaced with the Duran laboratory bottle and water boiler system in the process. The ultraviolet metal-semiconductor-metal photodetector (PD) was fabricated using DC sputtering method.

Findings

Vertically aligned nanorods images were captured from field emission scanning electron microscopy. XPS analysis confirmed greater spin-orbital interaction in the F and Ag co-doped ZnO sample and revealed the presence of F, Ag, Zn and O in the samples, indicating a successful doping process. X-ray diffraction revealed a hexagonal wurtzite structure with enhanced crystal quality upon co-doping. The bandgap decreased from 3.19 to 3.14 eV upon co-doping because of reduced defects density in the sample. Finally, an ultra-violet PD was fabricated with enhanced sensitivity and response times upon co-doping.

Originality/value

The low-cost, less energy-consuming Duran laboratory bottle and water boiler system were used as the substitute of expensive, more energy-consuming stainless autoclave and oven in a hydrothermal method for synthesis of F and Ag co-doped ZnO and subsequent fabrication of PD.

Details

Microelectronics International, vol. 40 no. 1
Type: Research Article
ISSN: 1356-5362

Keywords

Article
Publication date: 22 August 2022

Muhammad Aminu Haruna, Sallahuddin B. Hassan and Halima Salihi Ahmad

The aim is to examine the long run and short run linear and non-linear impact of foreign direct investment (FDI) inflows on poverty in Nigeria from 1980 to 2019.

Abstract

Purpose

The aim is to examine the long run and short run linear and non-linear impact of foreign direct investment (FDI) inflows on poverty in Nigeria from 1980 to 2019.

Design/methodology/approach

The Augmented Dickey Fuller, Phillips Perron and Kwiatkowski-Phillips-Schmidt-Shin unit root tests and bounds test were used to tests the series stationarity and co-integration, respectively. Autoregressive Distributive Lag (ARDL) and non-linear and linear autoregressive Distributive Lag (NARDL) estimators are employed to examine the long run and short run impact of the coefficients of the variables and diagnostic check.

Findings

The study finds that the variables are integrated at a level I(0) and the first difference I(I) and co-integrated. The ARDL estimator indicates that FDI significantly reduces poverty in the long and short run. The findings under NARDL shows FDI positive shock and FDI negative shock reduces poverty substantially in the long-short run, respectively. The error correction term is negative and significant.

Research limitations/implications

This study is limited to a single country (time series) and less informative compared with the panel data study with much informative and free from hetero-scedasticity. Future studies should consider panel data using a similar or dissimilar approach.

Practical implications

FDI inflows stimulate growth, thereby creating job openings, transfer of modern technology and reduce poverty and demonstrate that, if the finding integrated into policy actions, the government would attract FDI inflows for the real sector of the economy.

Social implications

FDI inflows lead to environmental degradation if inferior technology is use in the host economy, especially the weak environmental regulations in Nigeria.

Originality/value

The authors find no study that applied both ARDL and NARDL estimator, selection of variables measurement and time frame for the study in the context of Nigeria.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/IJSE-08-2020-0530.

Details

International Journal of Social Economics, vol. 50 no. 1
Type: Research Article
ISSN: 0306-8293

Keywords

Article
Publication date: 27 May 2022

Rabiu Saminu Jibril, Muhammad Aminu Isa and Zaharaddeen Salisu Maigoshi

The study aims to evaluate the impact of corporate board gender on the energy disclosure with moderating effect of institutional strength (global competitiveness index) by…

Abstract

Purpose

The study aims to evaluate the impact of corporate board gender on the energy disclosure with moderating effect of institutional strength (global competitiveness index) by the listed firms in Nigeria.

Design/methodology/approach

The study uses a sample of 49 non-financial firms listed on the floor of the Nigerian stock exchange commission for the period of five years (2016–2020). The study uses content analysis techniques to obtain data on environmental disclosure through the use of Global Reporting Initiative standards from the sampled firms. Random and fixed effect regression analyses were run for both direct and moderation models. Based on the results of the Hausman tests, random results were adopted and used in examining the relationship among research variables.

Findings

The study revealed average energy disclosure by the sampled firms. The overall results of the regression analysis found that board gender diversity is significantly related to energy disclosure. The institutional strength moderation result was found to have an insignificant impact on the relationship between board gender and energy disclosure.

Research limitations/implications

The study is constrained by not considering all environmentally sensitive firms in the country. Furthermore, the study considered only gender among numerous important board attributes. Hence, other important board attributes should be assessed for better energy disclosure. Future studies should consider data from all sensitive firms and other board attributes.

Practical implications

Recently, the Nigerian Government mandates all firms to comply with environmental disclosure in Nigeria, this should be used as a way forward to encourage and compel all listed firms to improve their energy disclosure.

Social implications

With diverse and vibrant women on boards, firms would benefit and gain legitimacy across demographic, ethnic and religious groups in the society. Hence, corporate bodies can effectively contribute toward enhancing the social welfare of various segments of society.

Originality/value

To the best of the authors’ knowledge, this is the first study that provides empirical evidence on the effect of board gender attributes on the energy disclosure using institutional strength as a moderator in Nigeria.

Details

Journal of Chinese Economic and Foreign Trade Studies, vol. 15 no. 3
Type: Research Article
ISSN: 1754-4408

Keywords

Content available
Article
Publication date: 20 November 2019

Adelina Broadbridge

475

Abstract

Details

Gender in Management: An International Journal , vol. 34 no. 8
Type: Research Article
ISSN: 1754-2413

Article
Publication date: 5 December 2016

Abubakar Hamid Danlami, Rabiul Islam, Shri Dewi Applanaidu and Ahmad Muhammad Tsauni

It is generally agreed that shortage of food, which is one of the main problems bedevilling Sub-Saharan African region, can be eliminated via the adoption of modern…

Abstract

Purpose

It is generally agreed that shortage of food, which is one of the main problems bedevilling Sub-Saharan African region, can be eliminated via the adoption of modern agricultural production technology, one of which is chemical fertiliser. The purpose of this paper is to assess the factors that can be used to improve the intensity of fertiliser use in rural Sub-Saharan African countries, taking Tofa, a local government area in Kano State, Nigeria, as the case study.

Design/methodology/approach

The study adopted a two-stage sampling technique. In the first stage, four districts were chosen using a simple random sampling technique from the list of the 15 districts in the local government area, namely, Tofa, Langel, Lambu and Doka. In the second stage, 25 farmer households were systematically selected from each of the selected communities. Moreover, Tobit Regression model was used to examine and analyse the influence of some socio-economic factors on fertiliser use intensity.

Findings

To improve the rate of fertiliser use intensity, farmers need to be exposed to skills and training on some off-farm jobs to raise the farmers’ income to enable them to afford more fertiliser. The study finds that income, contact with extension agent, age of the farmer and method of fertiliser application have positive significant impacts on the intensity of fertiliser use. On the other hand, price of fertiliser was found to have negative impact on the intensity of using fertiliser in the study area. Furthermore, based on the data obtained from the selected samples, the average rate of fertiliser application in Tofa local government area during the crop season of 2011/2012 was 25 kg per hectare.

Originality/value

Policies that will strengthen the farmers’ contact with extension agents throughout the farming periods should be adopted. Also, farmers need to be exposed with skills and training on some off farm jobs to raise the farmers’ income to enable them afford more fertiliser.

Details

International Journal of Social Economics, vol. 43 no. 12
Type: Research Article
ISSN: 0306-8293

Keywords

Article
Publication date: 23 November 2021

Ismail Aliyu Danmaraya, Aminu Hassan Jakada, Suraya Mahmood, Bello Alhaji Ibrahim and Ahmad Umar Ali

The purpose of this paper is to look at the asymmetric effect of oil production on environmental degradation in OPEC member countries from 1970–2019.

Abstract

Purpose

The purpose of this paper is to look at the asymmetric effect of oil production on environmental degradation in OPEC member countries from 1970–2019.

Design/methodology/approach

The authors build a nonlinear panel ARDL–PMG model using the Shin et al. (2014) nonlinear autoregressive distributed lag (ARDL) approach in panel form to assess both the short- and long-run impact of positive and negative oil production movements on CO2 emissions.

Findings

The result demonstrates that the variables are cointegrated. According to the linear long run coefficients, oil production, FDI inflows and economic growth both have a positive and significant relationship with CO2 emissions, implying that they deteriorate environmental quality in OPEC countries, while renewable energy has a negative relationship with CO2, implying that increasing renewable energy improves environmental quality. The asymmetric findings prove that positive and negative shocks of oil production exert a positive effect on carbon emissions in short run and long run.

Research limitations/implications

To begin with, the empirical assessments do not include all OPEC member nations; researchers are advised to resolve this constraint by looking at the economies of other OPEC members. Albeit the lack of data for other energy sources may serve as another constraint of this research, future research is expected to broaden the current framework via other energy sources such as nuclear, electricity, biomass, solar as well as wind.

Originality/value

The research adds to the body of knowledge as many of the prevailing studies in the literature failed to look at the asymmetric effect of oil production on the quality of environment. This is another gap in the literature that the current study is set out to fill. This study adds oil production as an explanatory variable and helps to extend the existing literature for OPEC countries, which could propose a solution to deal with ensuing environmental issues.

Details

International Journal of Energy Sector Management, vol. 16 no. 4
Type: Research Article
ISSN: 1750-6220

Keywords

Article
Publication date: 2 September 2021

Saheed Abdullahi Busari and Sikiru Olanrewaju Aminu

This study aims to explore the opportunities and challenges in activating a Smart Contract to enhance the efficiency and effectiveness of Ṣukūk offerings in the Islamic…

Abstract

Purpose

This study aims to explore the opportunities and challenges in activating a Smart Contract to enhance the efficiency and effectiveness of Ṣukūk offerings in the Islamic capital market.

Design/methodology/approach

The study adopts a mono-method qualitative approach. Data were obtained from survey interviews of two issuances on the fusion of smart contracts in Ṣukūk structures that were Sharīʿah-compliant. A thematic approach was further used to analyze the interview data based on the onion research method while opportunities and challenges of activating the Smart Ṣukūk (SṢ) relied on doctrinal evidence.

Findings

The results from the issuances across two jurisdictions showed that deployment of SṢ can resolve contractual ambiguities arising from Sharīʿah interpretations, jurisdictional policies and legal regime issues, which affect Ṣukūk origination and issuances especially on the right of investors in the event of Ṣukūk defaults. Although SṢ is automated, the third party’s presence is not eliminated as the blockchain platform still relies on the validators who are usually blockchain developers functioning as a third party in the Ṣukūk chain.

Research limitations/implications

The study relies on doctrinal literature to explain the features and requirements of SṢ. The empirical approach is limited to interview data based on local SṢ issuances. Future studies need to explore regulators’ role and global standards in cross-border issuance of SṢ with multiple jurisdictions/laws.

Practical implications

The paper concludes that the offering of SṢ using local currency has been successful in the two issuances because of the facilitative regulatory environment. However, addressing Ṣukūk’s challenges in cross-border offerings would require guidance from international standard-setters such as the Accounting and Auditing Organization for Islamic Financial Institutions and the Islamic Financial Services Board.

Originality/value

This study is an advanced application of smart contracts to alleviate the related Ṣukūk challenges in the Islamic capital market.

Details

Journal of Islamic Accounting and Business Research, vol. 13 no. 1
Type: Research Article
ISSN: 1759-0817

Keywords

Article
Publication date: 12 April 2022

Ahmad Raza Bilal, Tehreem Fatima, Sajid Iqbal and Muhammad Kashif Imran

The purpose of this study is to demonstrate how alertness enable small and medium scale enterprise (SME) owners to leverage their individual entrepreneurial orientation…

Abstract

Purpose

The purpose of this study is to demonstrate how alertness enable small and medium scale enterprise (SME) owners to leverage their individual entrepreneurial orientation (IEO) such as risk-taking, pro-activity, innovation, passion and perseverance in a better way to recognize opportunities for financial resources as compared to their counterparts who are not alert. Moreover, it elaborates on the mediating role of opportunity recognition of financial resources between IEO and SMEs’ access to finance (AF).

Design/methodology/approach

A three-wave time-lagged survey from a stratified sample of 271 small and medium scale business owners in Pakistan was conducted and the data were analysed using PROCESS models 1 and 4.

Findings

The findings grounded in the theory of Action Regulation, signify that the IEO of small and medium scale business owners helps them attain financial resources through opportunity recognition capacity which is an action characteristic. Moreover, the IEO of SME owners, coupled with entrepreneurial alertness (EA; a cognitive pre-action state), amplifies their ability to recognize opportunities for financial resource availability.

Originality/value

This is one of the initial studies to test the IEO scale, including passion and perseverance. Moreover, it has added to the individual-level antecedents of AF in small and medium scale businesses through the role of EA and opportunity recognition.

Abstract

Details

Developing Africa’s Financial Services
Type: Book
ISBN: 978-1-78714-186-5

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