Synthesis of Porous Ag–Ag2S@Ag–Au Hybrid Nanostructures with Broadband Absorption Properties and Their Photothermal Conversion Application

Al/Fe/Co doped ordered mesoporous carbon (OMC) composites have been synthesized by a facile method, and the influence of dopant on the electromagnetic (EM) and microwave absorption properties was investigated in the frequency range of 2–18[Formula: see text]GHz. Compared with Fe/Co–OMC composites, the Al–OMC nanocomposite played a great role in adjusting values and frequency dependence of complex permittivity, which gives rise to significant improved microwave absorption and reduced thickness of the corresponding paraffin wax composites. Reflection loss (RL) values less than [Formula: see text]5[Formula: see text]dB and [Formula: see text]10[Formula: see text]dB were obtained in the frequency range of 9.2–18[Formula: see text]GHz and 10.7–14.7[Formula: see text]GHz with a single thickness of 2.00[Formula: see text]mm, respectively. Such enhanced EM wave absorption property of the Al–OMC/paraffin wax composite was ascribed to its superior impedance matching characteristic. Thin thickness, broadband absorption microwave absorbers with Al doped OMC nanocomposites were obtained.

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GO/Bi2S3 Doped PVDF/TPU Nanofiber Membrane with Enhanced Photothermal Performance

International Journal of Molecular Sciences ◽

10.3390/ijms21124224 ◽

2020 ◽

Vol 21 (12) ◽

pp. 4224

Author(s):

Wenxiu Yang ◽

Yonggui Li ◽

Long Feng ◽

Yimiao Hou ◽

Shuo Wang ◽

...

Keyword(s):

Composite Membrane ◽

Irradiation Time ◽

Equilibrium Temperature ◽

Test Methods ◽

Nanofiber Membrane ◽

Photothermal Conversion ◽

Broadband Absorption ◽

Conversion Materials ◽

One Step ◽

Absorption Performance

Photothermal conversion materials have attracted wide attention due to their efficient utilization of light energy. In this study, a (GO)/Bi2S3-PVDF/TPU composite nanofiber membrane was systematically developed, comprising GO/Bi2S3 nanoparticles (NPs) as a photothermal conversion component and PVDF/TPU composite nanofibers as the substrate. The GO/Bi2S3 NPs were synthesized in a one-step way and the PVDF/TPU nanofibers were obtained from a uniformly mixed co-solution by electrospinning. GO nanoparticles with excellent solar harvesting endow the GO/Bi2S3-PVDF/TPU membrane with favorable photothermal conversion. In addition, the introduction of Bi2S3 NPs further enhances the broadband absorption and photothermal conversion properties of the GO/Bi2S3-PVDF/TPU composite membrane due to its perfect broadband absorption performance and coordination with GO. Finally, the results show that the GO/Bi2S3-PVDF/TPU composite membrane has the highest light absorption rate (about 95%) in the wavelength range of 400–2500 nm. In the 300 s irradiation process, the temperature changes in the GO/Bi2S3-PVDF/TPU composite membrane were the most significant and rapid, and the equilibrium temperature of the same irradiation time was 81 °C. Due to the presence of TPU, the mechanical strength of the composite film was enhanced, which is beneficial for its operational performance. Besides this, the morphology, composition, and thermal property of the membranes were evaluated by corresponding test methods.

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Broadband absorption and photothermal conversion in titanium diboride

10.1063/5.0009309 ◽

2020 ◽

Author(s):

Saju K. John ◽

Aji A. Anappara

Keyword(s):

Titanium Diboride ◽

Photothermal Conversion ◽

Broadband Absorption

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Direct Chemical Synthesis of Plasmonic Black Colloidal Gold Superparticles with Broadband Absorption Properties

Nano Letters ◽

10.1021/acs.nanolett.8b02629 ◽

2018 ◽

Vol 18 (9) ◽

pp. 5927-5932 ◽

Cited By ~ 12

Author(s):

Nayoung Kwon ◽

Hwisu Oh ◽

Reehyang Kim ◽

Arjyabaran Sinha ◽

Jaeyun Kim ◽

...

Keyword(s):

Chemical Synthesis ◽

Colloidal Gold ◽

Absorption Properties ◽

Broadband Absorption

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Broadband absorption and enhanced photothermal conversion property of octopod-like Ag@Ag2S core@shell structures with gradually varying shell thickness

Scientific Reports ◽

10.1038/s41598-017-18220-1 ◽

2017 ◽

Vol 7 (1) ◽

Cited By ~ 10

Author(s):

Qian Jiang ◽

Wenxia Zeng ◽

Canying Zhang ◽

Zhaoguo Meng ◽

Jiawei Wu ◽

...

Keyword(s):

Shell Thickness ◽

Shell Structures ◽

Core Shell ◽

Photothermal Conversion ◽

Broadband Absorption

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Design and fabrication of vertically aligned single-crystalline Si nanotube arrays and their enhanced broadband absorption properties

Applied Surface Science ◽

10.1016/j.apsusc.2019.145223 ◽

2020 ◽

Vol 508 ◽

pp. 145223 ◽

Cited By ~ 2

Author(s):

Y.M. Tseng ◽

R.Y. Gu ◽

S.L. Cheng

Keyword(s):

Nanotube Arrays ◽

Absorption Properties ◽

Single Crystalline ◽

Broadband Absorption ◽

Vertically Aligned

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164 fs mode-locked erbium-doped fiber laser based on tungsten ditelluride

Nanophotonics ◽

10.1515/nanoph-2019-0477 ◽

2020 ◽

Vol 9 (9) ◽

pp. 2763-2769

Author(s):

Mengli Liu ◽

Wenjun Liu ◽

Ximei Liu ◽

Yuyi Ouyang ◽

Zhiyi Wei

Keyword(s):

Ultrafast Lasers ◽

Modulation Depth ◽

Ring Cavity ◽

Transition Metal Dichalcogenides ◽

Ultrashort Pulses ◽

Saturable Absorption ◽

Absorption Properties ◽

Broadband Absorption ◽

Erbium Doped ◽

Metal Dichalcogenides

AbstractIn recent years, the diversity of transition metal dichalcogenides (TMDs) has made them occupy the essential status in the exploration of saturable absorbing materials. WTe2, also an important member of TMDs not only exhibits narrower band gap than MoS2 or WS2, but also has fast relaxation time, thus it has advantages in the realization of broadband absorption and ultrashort pulses. In this work, a WTe2 saturable absorber (SA) fabricated by magnetron sputtering technology features nonlinear absorption coefficient of −3.78 × 10−5 cm/W and modulation depth of 37.95%. After integrating this WTe2 SA into the ring cavity, a 164 fs mode-locked laser is achieved at 1557.71 nm. The laser remains stable about 8 h with an output power of 36.7 mW. The results show the favorable saturable absorption properties of WTe2, and further demonstrate the potential of WTe2 in the realization of ultrashort pulses, which indicates that WTe2 can be regarded as a possible candidate for future ultrafast lasers.

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