Plasmonic nanotechnology for photothermal applications – an evaluation

• A. R. Indhu,
• L. Keerthana and
• Gnanaprakash Dharmalingam

Beilstein J. Nanotechnol. 2023, 14, 380–419, doi:10.3762/bjnano.14.33

Comparative molecular dynamics simulations of thermal conductivities of aqueous and hydrocarbon nanofluids

• Adil Loya,
• Antash Najib,
• Fahad Aziz,
• Asif Khan,
• Guogang Ren and
• Kun Luo

Beilstein J. Nanotechnol. 2022, 13, 620–628, doi:10.3762/bjnano.13.54

• that a local micro-convection is induced in the base fluid due to the Brownian motion of nanoparticles, which increases both mixing and heat transport within the nanofluid [16][17]. Later, several studies demonstrated that interactions between liquid atoms and nanoparticles (i.e., a liquid adsorption

• the extended theoretical observation of thermal conductivity and its correlation with different percentages of mass fraction of graphene nanosheets loaded into ethylene glycol (EG). An increasing trend of the thermal conductivity of the nanofluid was observed (i.e., from 0.246 to 0.251 W·m−1·K−1 at

• increased by inducing CuO nanoparticles. A study was conducted in which it was observed that the CuO/water nanofluid had a positive impact, which resulted in an enhancement of thermal conductivity of about 12.4% as compared to distilled water. The KD2 thermal property analyzer was used for the measurements

Magnetohydrodynamic stagnation point on a Casson nanofluid flow over a radially stretching sheet

• Ganji Narender,
• Kamatam Govardhan and
• Gobburu Sreedhar Sarma

Beilstein J. Nanotechnol. 2020, 11, 1303–1315, doi:10.3762/bjnano.11.114

• article proposes a numerical model to investigate the impact of the radiation effects in the presence of heat generation/absorption and magnetic field on the magnetohydrodynamics (MHD) stagnation point flow over a radially stretching sheet using a Casson nanofluid. The nonlinear partial differential

• for higher values of the radiation parameter in a Casson nanofluid. Keywords: Casson nanofluid; magnetohydrodynamics (MHD); stagnation point; thermal radiation; viscous dissipation; Introduction The heat transfer mechanism has been known for its significant importance in many fields of engineering

• example, the fabrication of porous media, open and closed cavities and the implementation of magnetic effects, nanofluids and micrometer-sized channels have been employed to enhance thermal convection processes. Choi and collaborators [5] have used the term “nanofluid” for the first time to refer to a

Influence of the magnetic nanoparticle coating on the magnetic relaxation time

• Mihaela Osaci and
• Matteo Cacciola

Beilstein J. Nanotechnol. 2020, 11, 1207–1216, doi:10.3762/bjnano.11.105

• Abstract Colloidal systems consisting of monodomain superparamagnetic nanoparticles have been used in biomedical applications, such as the hyperthermia treatment for cancer. In this type of colloid, called a nanofluid, the nanoparticles tend to agglomeration. It has been shown experimentally that the

Effect of magnetic field, heat generation and absorption on nanofluid flow over a nonlinear stretching sheet

• Santoshi Misra and
• Govardhan Kamatam

Beilstein J. Nanotechnol. 2020, 11, 976–990, doi:10.3762/bjnano.11.82

• the influence of varied dimensionless parameters has been the focus of research in contemporary times. This work models the effect of magnetic field, heat generation and absorption parameter in a steady, laminar, two-dimensional boundary layer flow of a nanofluid over a permeable stretching sheet at a

• . Keywords: Brownian motion; heat generation and absorption; magnetic field; nanofluid; thermophoresis; Introduction The study of magnetohydrodynamic problems, such as nanofluid flow over a permeable stretching sheet, has recently become relevant due to potential applications in various fields of science

• and mass transfer. Seth et al. [18] and Soomro et al. [19][20] have extended nanofluid research by considering the effects of various dimensionless parameters on the nanoparticle flow when suspended in different nanofluids. Farooq et al. [21], Irfan et al. [22] and Pal et al. [23] have supplemented

Understanding nanoparticle flow with a new in vitro experimental and computational approach using hydrogel channels

• Armel Boutchuen,
• Dell Zimmerman,
• Abdollah Arabshahi,
• John Melnyczuk and
• Soubantika Palchoudhury

Beilstein J. Nanotechnol. 2020, 11, 296–309, doi:10.3762/bjnano.11.22

• experimental results. A computational analysis was conducted for nanofluid flow through an unbent cylindrical hydrogel channel to further confirm the applicability and accuracy of our experimental results. Two aqueous dispersions of 0.07 mmol PVP/0.005 mmol PEI-coated iron oxide NPs (size: 144 nm) of inlet

• mass concentrations of 4.12 g and 2.008 g and density of 5.24 g·mL−1 were investigated in these CFD simulations. A pointwise mesh generation software was used to generate the geometry and grid for simulating the nanofluid flow. Meshing, typically involves both surface and volume meshing and the

• conditions for the geometry. The nanofluid entered the hydrogel channel with an average velocity of 0.0051 m·s−1 and 0.0054 m·s−1 for which the Reynolds numbers based on the diameter of the tube were 120.1 and 127.1, respectively. The fluid flow within the hydrogel channel was considered laminar and

Al₂O₃/TiO₂ inverse opals from electrosprayed self-assembled templates

• Arnau Coll,
• Sandra Bermejo,
• David Hernández and
• Luís Castañer

Beilstein J. Nanotechnol. 2018, 9, 216–223, doi:10.3762/bjnano.9.23

• clarity. The electrospray process of a nanofluid containing polystyrene nanospheres is described in the Experimental section below. The second step, shown in Figure 1b, consists of the deposition of a thin, conformal layer of Al2O3 in an ALD reactor at 80 °C. Such a low deposition temperature preserves

• from B. Braun SA (Melsungen, Germany), a Hamilton needle (600 μm outer and 130 μm inner diameter; Hamilton, Bonaduz, GR, Switzerland), a high-voltage bipolar power source of −15 kV to +15 kV (Ultravolt, Ronkonkoma, NY, USA), and finally, an off-the-shelf nanofluid with 360 nm polystyrene nanoparticles

The difference in the thermal conductivity of nanofluids measured by different methods and its rationalization

• Aparna Zagabathuni,
• Sudipto Ghosh and
• Shyamal Kumar Pabi

Beilstein J. Nanotechnol. 2016, 7, 2037–2044, doi:10.3762/bjnano.7.194

• Aparna Zagabathuni Sudipto Ghosh Shyamal Kumar Pabi Department of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, West Bengal-721302, India 10.3762/bjnano.7.194 Abstract A suspension of particles below 100 nm in size, usually termed as nanofluid, often shows a

• notable enhancement in thermal conductivity, when measured by the transient hot-wire method. In contrast, when the conductivity of the same nanofluid is measured by the laser flash method, the enhancement reported is about one order of magnitude lower. This difference has been quantitatively resolved for

• -mediated heat transfer model; laser flash method; nanofluids; thermal conductivity; transient hot-wire method; Introduction In 1995, Choi et al. [1] dispersed copper nanoparticles in water, and termed the suspension as nanofluid. They observed a large increase in the thermal conductivity of this nanofluid

An adapted Coffey model for studying susceptibility losses in interacting magnetic nanoparticles

• Mihaela Osaci and
• Matteo Cacciola

Beilstein J. Nanotechnol. 2015, 6, 2173–2182, doi:10.3762/bjnano.6.223

• , one major issue is to control the parameters of the system, particularly the specific loss power (SLP). SLP is defined as the electromagnetic power lost per nanofluid mass unit. SLP is expressed in watts per kilogram. Recent researches show that the heating process through hyperthermia with magnetic

Structural, optical, opto-thermal and thermal properties of ZnS–PVA nanofluids synthesized through a radiolytic approach

• Alireza Kharazmi,
• Nastaran Faraji,
• Roslina Mat Hussin,
• Elias Saion,
• W. Mahmood Mat Yunus and
• Kasra Behzad

Beilstein J. Nanotechnol. 2015, 6, 529–536, doi:10.3762/bjnano.6.55

• PVA–ZnS nanofluid. The main peaks of PVA were observed at 3280, 2917, 1690, 1425, 1324, 1081 and 839 cm−1. These peaks are assigned to the O–H stretching vibration of the hydroxy group, CH2 asymmetric stretching vibration, C=O carbonyl stretch, C–H bending vibration of CH2, C–H deformation vibration

• , C–O stretching of acetyl groups and C-C stretching vibration, accordingly [20][21][22]. Similar peaks were observed for the ZnS–PVA nanofluid in addition to two new peaks located at 1245 and 390 cm−1 due to the C–H wagging and ZnS NPs, respectively [22][23]. These results have been sorted in Table 1

• . Another expected vibrational mode for PVA is the vibration mode of carbonyl stretching at about 1700 cm−1. The carbonyl stretching vibration was observed at 1690 cm−1 and 1718 cm−1 for PVA and ZnS–PVA nanofluid, respectively. The intensity of the carbonyl stretching mode was increased in the ZnS–PVA

Antimicrobial properties of CuO nanorods and multi-armed nanoparticles against B. anthracis vegetative cells and endospores

• Pratibha Pandey,
• Merwyn S. Packiyaraj,
• Himangini Nigam,
• Gauri S. Agarwal,
• Beer Singh and
• Manoj K. Patra

Beilstein J. Nanotechnol. 2014, 5, 789–800, doi:10.3762/bjnano.5.91

• out in the present study, it has been reported that CuO nanoparticles in nanofluid dispersion carry a positive zeta potential, i.e., a positive overall surface charge below pH 9.2, which is the isoelectric point of the CuO nanofluid [24]. In the current study the pH has not been adjusted but it has