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<p>There is an increasing need for autonomous microelectronic devices and wearable technologies, and as such, energy-harvesting systems need to be developed that are of smaller size and more efficient. Thermoelectric enthusiast-plasmonic coupling finds potential for rich energy conversion by integrating the photothermal heating originated by localized surface plasmon resonance (LSPR) and photosensitive voltage generation done by thermoelectric (TE). This research describes the synthesis, characterization, and assembly of Ru-Pt nanocomposites that are engineered towards improved plasmonic-thermoelectric functionality. The synthesis of nanoparticles was realized according to the co-reduction polyol with the ratio of Ru: Pt, affording a high purity (&gt; 99) and outstanding monodispersity. The composition 2:1 produced spherical particles (12.8 ± 2.1&#xa0;nm) as verified by TEM, HRTEM, and SAED that had both FCC (Pt) and HCP (Ru) phases and about 0.69% lattice strain. UV–Vis-NIR spectroscopy demonstrated the tunable LSPR bands (620–690&#xa0;nm), and the 2:1 sample exhibited high absorption and excellently elevated photothermal efficiency (52.6%) that reaching 41.2&#xa0;°C to show the radiation of simulated sunlight. Measurement of thermoelectric properties reported a Seebeck coefficient of 156&#xa0;µV/K, electrical conductivity of 218 S/cm, thermal conductivity of 0.81 W/m.K, and a ZT of ~ 0.52. On-chip integration showed constant output of 5.8&#xa0;mV at 60&#xa0;°C with low contact resistance (17.5 Ω) under CMOS CMOS-friendly environment. There was a &gt; 94% retention of performance since 150 thermal cycles. The findings of the present study validate the synergistic plasmonic–thermoelectric performance of Ru-Pt nanocomposite science and their applications in next-generation on-chip energy harvesting.</p> Graphical Abstract <p>The synergistic concept of this study relies on the thermoelectric–plasmonic coupling, whereby the Ru-Pt nanocomposites produce high electrical power through a combination of the localized surface plasmon resonance (LSPR)–generated photothermal heating with conversion to thermoelectric. The temperature at the location of the local plasmonic nanoparticle increases under solar or thermal irradiation, thus enhancing the thermal gradient across the thermoelectric matrix. This increased gradient increases the generation of Seebeck voltage. The system has excellent stability and efficiency to provide on-chip energy harvesting in dual-mode under both photothermal and thermoelectric phenomena by tuning the Ru: Pt ratios and incorporating nanoparticles into CMOS-compatible substrates.</p> <p></p>

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Multiphysics-Guided Design and On-Chip Integration of Ru–Pt Nanocomposites for Enhanced Thermoelectric–Plasmonic Energy Harvesting

  • 期刊论文

  • 发表日期：

    2025年8月29日

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  • Aman Sharma,
  • N. Nagabhooshanam,
  • Rintu Kumar,
  • Jayant Jagtap,
  • S. Sunitha,
  • B. E. V. L. Naidu,
  • A. Rajaram

摘要

There is an increasing need for autonomous microelectronic devices and wearable technologies, and as such, energy-harvesting systems need to be developed that are of smaller size and more efficient. Thermoelectric enthusiast-plasmonic coupling finds potential for rich energy conversion by integrating the photothermal heating originated by localized surface plasmon resonance (LSPR) and photosensitive voltage generation done by thermoelectric (TE). This research describes the synthesis, characterization, and assembly of Ru-Pt nanocomposites that are engineered towards improved plasmonic-thermoelectric functionality. The synthesis of nanoparticles was realized according to the co-reduction polyol with the ratio of Ru: Pt, affording a high purity (> 99) and outstanding monodispersity. The composition 2:1 produced spherical particles (12.8 ± 2.1 nm) as verified by TEM, HRTEM, and SAED that had both FCC (Pt) and HCP (Ru) phases and about 0.69% lattice strain. UV–Vis-NIR spectroscopy demonstrated the tunable LSPR bands (620–690 nm), and the 2:1 sample exhibited high absorption and excellently elevated photothermal efficiency (52.6%) that reaching 41.2 °C to show the radiation of simulated sunlight. Measurement of thermoelectric properties reported a Seebeck coefficient of 156 µV/K, electrical conductivity of 218 S/cm, thermal conductivity of 0.81 W/m.K, and a ZT of ~ 0.52. On-chip integration showed constant output of 5.8 mV at 60 °C with low contact resistance (17.5 Ω) under CMOS CMOS-friendly environment. There was a > 94% retention of performance since 150 thermal cycles. The findings of the present study validate the synergistic plasmonic–thermoelectric performance of Ru-Pt nanocomposite science and their applications in next-generation on-chip energy harvesting.

Graphical Abstract

The synergistic concept of this study relies on the thermoelectric–plasmonic coupling, whereby the Ru-Pt nanocomposites produce high electrical power through a combination of the localized surface plasmon resonance (LSPR)–generated photothermal heating with conversion to thermoelectric. The temperature at the location of the local plasmonic nanoparticle increases under solar or thermal irradiation, thus enhancing the thermal gradient across the thermoelectric matrix. This increased gradient increases the generation of Seebeck voltage. The system has excellent stability and efficiency to provide on-chip energy harvesting in dual-mode under both photothermal and thermoelectric phenomena by tuning the Ru: Pt ratios and incorporating nanoparticles into CMOS-compatible substrates.