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Article ; Online: Nanoassembly of gold nanoparticles: An active substrate for size-dependent surface-enhanced Raman scattering.

Hossain, Mohammad Kamal

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

2020 Volume 242, Page(s) 118759

Abstract: Nanoassembly of gold nanoparticles has been achieved through a simple and facile process without using any surfactants or linkers. Atomic force microscopy confirmed assemblies of several tens of microns, whereas tiny interparticle gaps less than 5 nm was ...

Abstract	Nanoassembly of gold nanoparticles has been achieved through a simple and facile process without using any surfactants or linkers. Atomic force microscopy confirmed assemblies of several tens of microns, whereas tiny interparticle gaps less than 5 nm was revealed by scanning electron microscopy. Such nanoassemblies with tiny interparticle gaps were found to be highly surface-enhanced Raman scattering (SERS)-active with enhancement factor in the order of 6 to 8. Contrary to usual trends in nanoparticles size dependent SERS enhancement, such 2D nanoassemblies of different sizes of nanoparticles showed relatively broadened SERS enhancement distribution. Finite difference time domain (FDTD) analysis was employed to highlight the EM-field distribution in connection to such giant SERS enhancement. In depth and hotsite-wise analysis on EM near-field distributions for monomers, dimers and septamers of 50 nm of gold nanoparticles were carried out at three specific incident polarizations (i.e. s-, 45° and p-polarizations). At s- and p-polarization the strongest hotsites were having the EM near-field distributions in the range of 124.8 and 133.3 V/m respectively with lower population of confined EM near-fields. Such correlated investigation will be indispensable to understand and interpret hierarchical and functional nanoassemblies from its unit nanoparticle blocks for the advances of technological breakthroughs.
Language	English
Publishing date	2020-08-01
Publishing country	England
Document type	Journal Article
ZDB-ID	210413-1
ISSN	1873-3557 ; 0370-8322 ; 0584-8539 ; 1386-1425
ISSN (online)	1873-3557
ISSN	0370-8322 ; 0584-8539 ; 1386-1425
DOI	10.1016/j.saa.2020.118759
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Article ; Online: Understanding the impact of socioeconomic and health factors on geriatric depression: A comparative study in rural and urban Bangladesh.

Hossain, Mohammad Kamal / Islam, Md Nazrul / Uddin, Mohammed Taj / Hossain, Md Sabbir

Health science reports

2024 Volume 7, Issue 2, Page(s) e1849

Abstract: Background and aims: The prevalence of depression among the elderly is a growing concern, and this study examines the differences between urban and rural areas in terms of geriatric depression.: Methods: Using a two-stage random sampling approach in ... ...

Abstract	Background and aims: The prevalence of depression among the elderly is a growing concern, and this study examines the differences between urban and rural areas in terms of geriatric depression. Methods: Using a two-stage random sampling approach in urban areas and a multistage random sampling approach in rural areas, the study surveyed 944 elderly individuals of both sexes. Results: The results indicate that the prevalence of depression was high, with 52.5% of the elderly population experiencing mild to severe depression. The study found that increasing age, female gender, nuclear family structure, and involvement of housewives or others were significant factors affecting depression in urban areas, while increasing age and elderly people without spouses were significant factors in rural areas. Additionally, the study identified hearing impairment, asthma, and arthritis as risk factors for depression in rural areas, and bronchitis, heart disease, and thyroid illness as significant factors in urban areas. Conclusion: These findings highlight the need for policymakers to focus on addressing the mental health needs of older people, particularly women and those without spouses.
Language	English
Publishing date	2024-01-30
Publishing country	United States
Document type	Journal Article
ISSN	2398-8835
ISSN (online)	2398-8835
DOI	10.1002/hsr2.1849
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Article ; Online: Polymer-Templated Durable and Hydrophobic Nanostructures for Hydrogen Gas Sensing Applications.

Hossain, Mohammad Kamal / Drmosh, Qasem Ahmed

Polymers

2021 Volume 13, Issue 24

Abstract: A simple and hands-on one-step process has been implemented to fabricate polymer-templated hydrophobic nanostructures as hydrogen gas sensing platforms. Topographic measurements have confirmed irregular hills and dips of various dimensions that are ... ...

Abstract	A simple and hands-on one-step process has been implemented to fabricate polymer-templated hydrophobic nanostructures as hydrogen gas sensing platforms. Topographic measurements have confirmed irregular hills and dips of various dimensions that are responsible for creating air bubble pockets that satisfy the Cassie-Baxter state of hydrophobicity. High-resolution field-emission scanning electron microscopy (FESEM) has revealed double-layer structures consisting of fine microscopic flower-like structures of nanoscale petals on the top of base nanostructures. Wetting contact angle (WCA) measurements further revealed the contact angle to be ~142.0° ± 10.0°. Such hydrophobic nanostructures were expected to provide a platform for gas-sensing materials of a higher surface area. From this direction, a very thin layer of palladium, ca. 100 nm of thickness, was sputtered. Thereafter, further topographic and WCA measurements were carried out. FESEM micrographs revealed that microscopic flower-like structures of nanoscale petals remained intact. A sessile drop test reconfirmed a WCA of as high as ~130.0° ± 10.0°. Due to the inherent features of hydrophobic nanostructures, a wider surface area was expected that can be useful for higher target gas adsorption sites. In this context, a customized sensing facility was set up, and H
Language	English
Publishing date	2021-12-20
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2527146-5
ISSN	2073-4360 ; 2073-4360
ISSN (online)	2073-4360
ISSN	2073-4360
DOI	10.3390/polym13244470
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Clusters-based silver nanorings: An active substrate for surface-enhanced Raman scattering.

Hossain, Mohammad Kamal / Drmosh, Qasem Ahmed

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

2021 Volume 263, Page(s) 120141

Abstract: Plasmonic nanostructures, particularly irregular surfaces of ring-like silver (Ag) nanostructures are promising candidates in surface-enhanced Raman scattering (SERS) spectroscopy. In this work, clusters-based Ag nanorings have been fabricated and ... ...

Abstract	Plasmonic nanostructures, particularly irregular surfaces of ring-like silver (Ag) nanostructures are promising candidates in surface-enhanced Raman scattering (SERS) spectroscopy. In this work, clusters-based Ag nanorings have been fabricated and characterized as SERS-active substrates. The rim of the as-fabricated Ag nanorings was found neither discontinuous nor linear aggregation of nanoparticles. High-resolution field emission scanning electron microscopy (FESEM) revealed that the individual constituent clusters were different from each other, particularly in terms of size and shape in addition to the cases how such clusters were emerged as the edge of the nanoring. Considering the dimensions of the clusters and the arrangement of such clusters as nanorings, it was speculated that the local electromagnetic (EM) near-field distributions would excel and thus enhanced SERS signals would be achieved. Indeed, the inherent features of the nanorings facilitated to achieve SERS enhancement factors as high as 2.1 × 10
Language	English
Publishing date	2021-07-06
Publishing country	England
Document type	Journal Article
ZDB-ID	210413-1
ISSN	1873-3557 ; 0370-8322 ; 0584-8539 ; 1386-1425
ISSN (online)	1873-3557
ISSN	0370-8322 ; 0584-8539 ; 1386-1425
DOI	10.1016/j.saa.2021.120141
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Financial progress, inward remittances, and economic growth in Bangladesh: Is the nexus asymmetric?

Golder, Uttam / Rumaly, Nishat / Hossain, Mohammad Kamal / Nigar, Meher

Heliyon

2023 Volume 9, Issue 3, Page(s) e14454

Abstract: Prior studies in Bangladesh examined the effects of financial progress and inward remittances on economic growth and postulated a symmetrical relationship, ignoring the potential asymmetrical relationship between variables. Therefore, this study intends ... ...

Abstract	Prior studies in Bangladesh examined the effects of financial progress and inward remittances on economic growth and postulated a symmetrical relationship, ignoring the potential asymmetrical relationship between variables. Therefore, this study intends to explore the asymmetrical effects of financial progress and remittances on economic growth in Bangladesh. The study used yearly time series data from 1988 to 2020 and employed the Nonlinear Autoregressive Distributed Lag (NARDL) model. Our study confirmed the asymmetrical effects of financial progress and remittances on economic growth and revealed a long-run association between the variables being studied. The study's novelties are that both positive and negative fluctuations in financial progress and remittances boost Bangladesh's economic growth. Thus, it is essential to enact policies that support financial progress by ensuring sustainable development in financial institutions and financial markets. In addition, remittances should be employed for productive purposes rather than only for consumption to improve the country's economic backbone.
Language	English
Publishing date	2023-03-11
Publishing country	England
Document type	Journal Article
ZDB-ID	2835763-2
ISSN	2405-8440
ISSN	2405-8440
DOI	10.1016/j.heliyon.2023.e14454
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Silver nanoparticles, nanoneedles and nanorings: impact of electromagnetic near-field on surface-enhanced Raman scattering.

Hossain, Mohammad Kamal / Drmosh, Qasem Ahmed / Arifuzzaman, Md

Physical chemistry chemical physics : PCCP

2022 Volume 24, Issue 15, Page(s) 8787–8799

Abstract: The dimension of plasmonic nanostructures does matter in localizing electromagnetic (EM) field and improving surface-enhanced Raman scattering (SERS) activity. Zero-dimensional (0D), one-dimensional (1D) and two-dimensional (2D) plasmonic nanostructures ... ...

Abstract	The dimension of plasmonic nanostructures does matter in localizing electromagnetic (EM) field and improving surface-enhanced Raman scattering (SERS) activity. Zero-dimensional (0D), one-dimensional (1D) and two-dimensional (2D) plasmonic nanostructures are promising candidates to validate SERS enhancement and the mechanisms thereof. In this work, silver (Ag) nanoparticles (NPs), nanoneedles (NNs) and nanorings (NRs) have been considered to demonstrate the impact of EM near-field distributions on SERS of the corresponding 0D (
Language	English
Publishing date	2022-04-13
Publishing country	England
Document type	Journal Article
ZDB-ID	1476244-4
ISSN	1463-9084 ; 1463-9076
ISSN (online)	1463-9084
ISSN	1463-9076
DOI	10.1039/d1cp05681f
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Article ; Online: Financial progress, inward remittances, and economic growth in Bangladesh: Is the nexus asymmetric?

Golder, Uttam / Rumaly, Nishat / Hossain, Mohammad Kamal / Nigar, Meher

Heliyon. 2023 Mar., v. 9, no. 3 p.e14454-

2023

Abstract	Prior studies in Bangladesh examined the effects of financial progress and inward remittances on economic growth and postulated a symmetrical relationship, ignoring the potential asymmetrical relationship between variables. Therefore, this study intends to explore the asymmetrical effects of financial progress and remittances on economic growth in Bangladesh. The study used yearly time series data from 1988 to 2020 and employed the Nonlinear Autoregressive Distributed Lag (NARDL) model. Our study confirmed the asymmetrical effects of financial progress and remittances on economic growth and revealed a long-run association between the variables being studied. The study's novelties are that both positive and negative fluctuations in financial progress and remittances boost Bangladesh's economic growth. Thus, it is essential to enact policies that support financial progress by ensuring sustainable development in financial institutions and financial markets. In addition, remittances should be employed for productive purposes rather than only for consumption to improve the country's economic backbone.
Keywords	models ; sustainable development ; time series analysis ; Bangladesh ; Asymmetric relationship ; Financial progress ; Remittances ; Economic growth ; NARDL
Language	English
Dates of publication	2023-03
Publishing place	Elsevier Ltd
Document type	Article ; Online
Note	Use and reproduction
ZDB-ID	2835763-2
ISSN	2405-8440
ISSN	2405-8440
DOI	10.1016/j.heliyon.2023.e14454
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Half-raspberry-like bimetallic nanoassembly: Interstitial dependent correlated surface plasmon resonances and surface-enhanced Raman spectroscopy.

Hossain, Mohammad Kamal / Kitahama, Yasutaka / Ozaki, Yukihiro

Physical chemistry chemical physics : PCCP

2021 Volume 23, Issue 41, Page(s) 23875–23885

Abstract: Correlated localized surface plasmon resonance (SPR), surface-enhanced Raman scattering (SERS) and localized electromagnetic (EM) field distributions of pure and modified gold (Au) nanoassemblies have been demonstrated. The Au nanoassemblies were ... ...

Abstract	Correlated localized surface plasmon resonance (SPR), surface-enhanced Raman scattering (SERS) and localized electromagnetic (EM) field distributions of pure and modified gold (Au) nanoassemblies have been demonstrated. The Au nanoassemblies were decorated as half-raspberry-like nanostructures by silver (Ag) mists, and the characteristics of their SPR and SERS were observed at the same spatial position with and without decoration. The decoration of Au nanoassemblies was analyzed in-depth and confirmed by atomic force microscopy (AFM) and field emission scanning electron microscopy (FESEM). Multifunctional and lab-built microscopy was used to capture correlated SPR and SERS imaging and spectral measurements. Without decoration, strong SPR peaks and enhanced SERS signals were observed, whereas intense plasmon excitation deteriorated with a broadening and diminishing peak and the SERS enhancement dropped at least by 10 fold upon the modification. Preferential enhancement near the edge was observed in the correlated SPR and SERS measurements. The variations in localized SPR, subsequent SERS enhancement, and preferential confinement were speculated concerning localized EM near-field deformation. A typical tetramer with five interstitials was modeled and simulated by finite difference time domain (FDTD) analysis at different incident polarizations. The EM near-field distributions were extracted with and without decoration of constituent interstitials by Ag mists. Without the modification of participating interstitials, the EM near-field distributions were found confined, whereas additional EM near-field confinements were observed in the presence of Ag mists. Such EM near-field deformations due to the modification of constituent interstitials were supposed to broaden and deteriorate SPR characteristics of Au nanoassemblies as observed under this investigation.
Language	English
Publishing date	2021-10-27
Publishing country	England
Document type	Journal Article
ZDB-ID	1476244-4
ISSN	1463-9084 ; 1463-9076
ISSN (online)	1463-9084
ISSN	1463-9076
DOI	10.1039/d1cp03402b
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Plasmonic Pollen Grain Nanostructures: A Three-Dimensional Surface-Enhanced Raman Scattering (SERS)-Active Substrate.

Hossain, Mohammad Kamal / Drmosh, Qasem Ahmed / Mohamedkhair, Amar Kamal

Chemistry, an Asian journal

2021 Volume 16, Issue 13, Page(s) 1807–1819

Abstract: A new route has been developed to design plasmonic pollen grain-like nanostructures (PGNSs) as surface-enhanced Raman scattering (SERS)-active substrate. The nanostructures consisting of silver (Ag) and gold (Au) nanoparticles along with zinc oxide (ZnO) ...

Abstract	A new route has been developed to design plasmonic pollen grain-like nanostructures (PGNSs) as surface-enhanced Raman scattering (SERS)-active substrate. The nanostructures consisting of silver (Ag) and gold (Au) nanoparticles along with zinc oxide (ZnO) nanoclusters as spacers were found highly SERS-active. The morphology of PGNSs and those obtained in the intermediate stage along with each elemental evolution has been investigated by a high-resolution field emission scanning electron microscopy. The optical band gaps and crystal structure have been identified by UV-vis absorption and X-ray powder diffraction (XRD) measurements, respectively. For PGNSs specimen, three distinct absorption bands related to constituent elements Ag, Au, and ZnO were observed, whereas XRD peaks confirmed the existence of Ag, Au, and ZnO within the composition of PGNSs. SERS-activity of PGNSs was confirmed using Rhodamine 6G (R6G) as Raman-active dyes. Air-cooled solid-state laser kits of 532 nm were used as excitation sources in SERS measurements. SERS enhancement factor was estimated for PGNSs specimen and was found as high as 3.5×10
MeSH term(s)	Animals ; Gold/chemistry ; Metal Nanoparticles/chemistry ; Metal Nanoparticles/ultrastructure ; Mice ; Pollen ; Silver/chemistry ; Spectrum Analysis, Raman ; Surface Properties ; Zinc Oxide/chemistry
Chemical Substances	Silver (3M4G523W1G) ; Gold (7440-57-5) ; Zinc Oxide (SOI2LOH54Z)
Language	English
Publishing date	2021-06-08
Publishing country	Germany
Document type	Journal Article
ZDB-ID	2233006-9
ISSN	1861-471X ; 1861-4728
ISSN (online)	1861-471X
ISSN	1861-4728
DOI	10.1002/asia.202100386
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Chemiresistive Gas Sensing using Graphene-Metal Oxide Hybrids.

Hossain, Mohammad Kamal / Hendi, Abdulmajeed / Asim, Nilofar / Alghoul, Mohammad Ahmed / Rafiqul Islam, Mohammad / Hussain, Syed Muhammad Shakil

Chemistry, an Asian journal

2023 , Page(s) e202300529

Abstract: Chemiresistive sensing lies in its ability to provide fast, accurate, and reliable detection of various gases in a cost-effective and non-invasive manner. In this context, graphene-functionalized metal oxides play crucial role in hydrogen gas sensing. ... ...

Abstract	Chemiresistive sensing lies in its ability to provide fast, accurate, and reliable detection of various gases in a cost-effective and non-invasive manner. In this context, graphene-functionalized metal oxides play crucial role in hydrogen gas sensing. However, a cost-effective, defect-free, and large production schemes of graphene-based sensors are required for industrial applications. This review focuses on graphene-functionalized metal oxide nanostructures designed for gaseous molecules detection, mainly hydrogen gas sensing applications. For the convenience of the reader and to understand the role of graphene-metal oxide hybrids (GMOH) in gas sensing activities, a brief overview of the properties and synthesis routes of graphene and GMOH have been reported in this paper. Metal oxides play an essential role in the GMOH construct for hydrogen gas sensing. Therefore, various metal oxides-decorated GMOH constructs are detailed in this review as gas sensing platforms, particularly for hydrogen detection. Finally, specific directions for future research works and challenges ahead in designing highly selective and sensitive hydrogen gas sensors have been highlighted. As illustrated in this review, understanding of the metal oxides-decorated GMOH constructs is expected to guide ones in developing emerging hybrid nanomaterials that are suitable for hydrogen gas sensing applications.
Language	English
Publishing date	2023-09-11
Publishing country	Germany
Document type	Journal Article ; Review
ZDB-ID	2233006-9
ISSN	1861-471X ; 1861-4728
ISSN (online)	1861-471X
ISSN	1861-4728
DOI	10.1002/asia.202300529
Database	MEDical Literature Analysis and Retrieval System OnLINE

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