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Verma AK, Yadav N, Singh SP, Dey KK, Singh D, Yadav RR. Study of Ultrasonic Attenuation and Thermal Conduction in Bimetallic Gold/Platinum Nanofluids : Effect of thermal conductivity on ultrasonic attenuation of gold and gold/platinum nanofluids. JOHNSON MATTHEY TECHNOLOGY REVIEW 2021. [DOI: 10.1595/205651321x16038755164270] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Here, we report the frequency dependent ultrasonic attenuation of monometallic gold and bimetallic gold/platinum based aqueous nanofluids (NFs). The as-synthesised bimetallic NFs (BMNFs) revealed less resistance to ultrasonic waves compared to the monometallic NFs. Thermal conductivity
of both NFs taken at different concentrations revealed substantial conductivity improvement when compared to the base fluid, although gold/platinum showed lesser improvement compared to gold. Characterisation of the as-synthesised nanoparticles (NPs) and fluids was carried out with X-ray diffraction
(XRD), ultraviolet-visible (UV-vis) spectroscopy, transmission electron microscopy (TEM) and energy-dispersive X-ray spectroscopy (EDS). The distinct two-phase bimetallic nature of gold/platinum, its two plasmonic band optical absorption features and the spherical morphology of the particles
were shown. The findings were correlated with the observed thermal and ultrasonic behaviour and proper rationalisation is provided. It was revealed that the comparatively lesser thermal conductivity of gold/platinum had direct implication on its attenuation property. The findings could have
important repercussions in both industrial applications and in the mechanistic approach towards the field of ultrasonic attenuation in NFs.
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Affiliation(s)
- Alok Kumar Verma
- Department of Physics, Prof. Rajendra Singh (Rajju Bhaiya) Institute of Physical Sciences for Study and Research, Veer Bahadur Singh Purvanchal University Jaunpur-222003, Uttar Pradesh India
| | - Navneet Yadav
- Department of Physics, University of Allahabad Allahabad-211002 India
| | - Shakti Pratap Singh
- Department of Physics, Prof. Rajendra Singh (Rajju Bhaiya) Institute of Physical Sciences for Study and Research, Veer Bahadur Singh Purvanchal University Jaunpur-222003, Uttar Pradesh India
| | - Kajal Kumar Dey
- Centre for Nanoscience and Technology, Prof. Rajendra Singh (Rajju Bhaiya) Institute of Physical Sciences for Study and Research, Veer Bahadur Singh Purvanchal University Jaunpur-222003, Uttar Pradesh India
| | - Devraj Singh
- Department of Physics, Prof. Rajendra Singh (Rajju Bhaiya) Institute of Physical Sciences for Study and Research, Veer Bahadur Singh Purvanchal University Jaunpur-222003, Uttar Pradesh India
| | - Raja Ram Yadav
- Department of Physics, Prof. Rajendra Singh (Rajju Bhaiya) Institute of Physical Sciences for Study and Research, Veer Bahadur Singh Purvanchal University Jaunpur-222003, Uttar Pradesh India
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Special Issue: Photoactive Materials: Synthesis, Applications and Technology. MATERIALS 2021; 14:ma14030585. [PMID: 33513834 PMCID: PMC7865794 DOI: 10.3390/ma14030585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 01/25/2021] [Indexed: 11/17/2022]
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Stogiannidis G, Tsigoias S, Kaziannis S, Kalampounias AG. Stationary and transient acoustically induced birefringence of methyl acetate molecules dissolved in ethanol. CHEMICAL PAPERS 2020. [DOI: 10.1007/s11696-020-01052-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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