Facile synthesis of aqueous silver nanoparticles and silver/molybdenum disulfide nanocomposites and investigation of their nonlinear optical properties

Zhang, Xiaoyan; Wang, Hongqiang; Sun, Yi; Zhou, Wei; Wang, Jun

doi:10.1007/s42864-021-00113-6

Cited by 6 publications

(3 citation statements)

References 51 publications

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“…These aggregation chains were proposed to be equivalent to the gold or silver nanoellipsoids or nanorods, in which the LSPR separates into transverse and longitudinal modes according to the simulation results. The longitudinal mode generates a new LSPR absorption band (AOA band) in the long-wavelength region, and this band redshifts with an increase in the nanoellipsoid or nanorod length [21][22][23][24], similar to the increase in the chain lengths of the gold or silver nanoparticles aggregates. This seems reasonable to explain the appearance and redshift of the AOA band.…”

Section: Introductionmentioning

confidence: 99%

Charge transfer effect: a new assignment of the abnormal optical absorption band of gold nanoparticles

Shi¹,

wang²,

su³

et al. 2023

Nanotechnology

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As a significant accompanying phenomenon of surface-enhanced Raman scattering (SERS), the addition of foreign molecules to colloidal gold or silver nanoparticles results in a new abnormal optical absorption (AOA) band, which usually appears in the long-wavelength region. The assignment of this AOA band has long been debated as an important issue that is desired to be addressed in the SERS field, which is crucial for a clear understanding of the SERS enhancement mechanism and beneficial to surface plasmonics. In this study, both the calculated and measured optical absorptions of gold nanoparticle monomers and dimers as well as their interactions with adsorbed molecules, showed that the AOA band in the long-wavelength region which was assigned to the characteristic longitudinal LSPR effect of gold nanoparticle chain aggregates in conventional SERS electromagnetic theory, should be attributed to the charge-transfer resonance absorption from gold nanoparticles to adsorbed molecules. This was further confirmed by the corresponding SERS effects. As the excitation wavelength at 785 nm was resonant with the broad AOA band centered at 750 nm, the SERS peaks of the adsorbed pyridine molecules could be dramatically chemically enhanced due to the charge-transfer resonance effect. In contrast, under an excitation wavelength of 532 nm, the SERS peaks appeared very weak, although the this excitation wavelength was resonant with the LSPR absorption band of the individual gold nanoparticles.

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Section: Introductionmentioning

confidence: 99%

Charge transfer effect: a new assignment of the abnormal optical absorption band of gold nanoparticles

Shi¹,

wang²,

su³

et al. 2023

Nanotechnology

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“…EMI not only has a negative impact on people’s health, but also compromises performance of electronic devices by causing information leakage, false operations, or even complete failure [ 3 , 4 , 5 , 6 , 7 ]. Typical materials used for mitigating EM transmission including sheet metals, metal screens, and metal foams, cannot simultaneously integrate these intriguing characteristics due to opacity, high density, and inflexibility [ 8 , 9 , 10 ]. Recently, MXene are under the spotlight on account of their good electrical conductivity, light weight, extremely large specific surface areas, excellent hydrophilicity, and easy processability for efficient EMI shielding materials [ 11 , 12 , 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Asymmetric and Flexible Ag-MXene/ANFs Composite Papers for Electromagnetic Shielding and Thermal Management

Ye,

Zhang,

Zhou

et al. 2023

Nanomaterials

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Lightweight, flexible, and electrically conductive thin films with high electromagnetic interference (EMI) shielding effectiveness and excellent thermal management capability are ideal for portable and flexible electronic devices. Herein, the asymmetric and multilayered structure Ag-MXene/ANFs composite papers (AMAGM) were fabricated based on Ag-MXene hybrids and aramid nanofibers (ANFs) via a self-reduction and alternating vacuum-assisted filtration process. The resultant AMAGM composite papers exhibit high electrical conductivity of 248,120 S m−1, excellent mechanical properties with tensile strength of 124.21 MPa and fracture strain of 4.98%, superior EMI shielding effectiveness (62 dB), ultra-high EMI SE/t (11,923 dB cm2 g−1) and outstanding EMI SE reliability as high as 96.1% even after 5000 cycles of bending deformation benefiting from the unique structure and the 3D network at a thickness of 34 μm. Asymmetric structures play an important role in regulating reflection and absorption of electromagnetic waves. In addition, the multifunctional nanocomposite papers reveal outstanding thermal management performances such as ultrafast thermal response, high heating temperatures at low operation voltage, and high heating stability. The results indicate that the AMAGM composite papers have excellent potential for high-integration electromagnetic shielding, wearable electronics, artificial intelligence, and high-performance heating devices.

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“…Doped GaN can be integrated with different transition metal dichalcogenides (TMD) to form heterostructure photodiodes with improved responsivity, speed, and wide operating wavelength range. In recent years, TMDs have attained a great deal of attention from the optoelectronic industry due to their ability to transform their properties, varying with their thickness [15][16][17][18][19][20][21][22][23][24]. Moreover, they provide freedom to the constraint of lattice matching during formation of a heterostructure [25].…”

Section: Introductionmentioning

confidence: 99%

Self-powered, low-noise and high-speed nanolayered MoSe₂/p-GaN heterojunction photodetector from ultraviolet to near-infrared wavelengths

et al. 2022

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Integration of nanolayered metal chalcogenides with wide-bandgap semiconductors forming pn heterojunction leads to the way of high-performance photodetection. This work demonstrates the fabrication of a few nanometer thick Molybdenum diselenide (MoSe2)/ Mg-doped Gallium Nitride (p-GaN) heterostructure for light detection purposes. The device exhibits low noise broadband spectral response from ultraviolet to near-infrared range (300 nm – 950 nm). The band-alignment and the charge transfer at the MoSe2/p-GaN interface promote self-powered photodetection with high photocurrent to dark current ratio of 2000 and 1000 at 365 nm and 640 nm, respectively. A high responsivity of 130 A/W, detectivity of 4.8 × 1010 Jones, and low noise equivalent power (NEP) of 18 fW/Hz1/2 at 365 nm is achieved at an applied bias of 1V. Moreover, the transient measurements reveal a fast rise/fall time of 407/710 µsec for the fabricated device. These outcomes exemplify the viability of MoSe2/p-GaN heterostructure for high-speed and low-noise broadband photodetector applications.

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Facile synthesis of aqueous silver nanoparticles and silver/molybdenum disulfide nanocomposites and investigation of their nonlinear optical properties

Cited by 6 publications

References 51 publications

Charge transfer effect: a new assignment of the abnormal optical absorption band of gold nanoparticles

Charge transfer effect: a new assignment of the abnormal optical absorption band of gold nanoparticles

Asymmetric and Flexible Ag-MXene/ANFs Composite Papers for Electromagnetic Shielding and Thermal Management

Self-powered, low-noise and high-speed nanolayered MoSe₂/p-GaN heterojunction photodetector from ultraviolet to near-infrared wavelengths

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Facile synthesis of aqueous silver nanoparticles and silver/molybdenum disulfide nanocomposites and investigation of their nonlinear optical properties

Cited by 6 publications

References 51 publications

Charge transfer effect: a new assignment of the abnormal optical absorption band of gold nanoparticles

Charge transfer effect: a new assignment of the abnormal optical absorption band of gold nanoparticles

Asymmetric and Flexible Ag-MXene/ANFs Composite Papers for Electromagnetic Shielding and Thermal Management

Self-powered, low-noise and high-speed nanolayered MoSe2/p-GaN heterojunction photodetector from ultraviolet to near-infrared wavelengths

Contact Info

Product

Resources

About

Self-powered, low-noise and high-speed nanolayered MoSe₂/p-GaN heterojunction photodetector from ultraviolet to near-infrared wavelengths