Static and ultrafast optical response of two metal nanoparticles glued with a semiconductor quantum dot

Gurung, Sabina; Singh, Asha; Khatua, Durga Prasad; Srivastava, Himanshu; Jayabalan, J.

doi:10.1016/j.photonics.2020.100869

Cited by 1 publication

(2 citation statements)

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“…When CdTe QDs get attached to MNP, the dielectric constant of the medium that surrounds it increases. This leads to a red-shifting of the LSPR peak [39,44,45]. Such red-shift has been observed when AgPT of larger sizes was surrounded by CdTe QDs [39].…”

Section: Resultsmentioning

confidence: 84%

“…Similar hybrid and superstructures of AgPT-CdTe hybrid are also expected to form in the mixed colloid. We find that the HNSs having γ = 0.5 are stable for several days, while the stability of colloids having a γ > 0.5 reduces with an increase in γ [36,45]. For the experimental evidence to support the schematic representation, we need microscopic techniques like AFM or TEM, or SEM.…”

Section: Resultsmentioning

confidence: 99%

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Effect of spectral overlap and mixing ratio on metal-semiconductor mixed colloid

Gurung¹,

Singh²,

Jayabalan³

2021

Phys. Scr.

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Metal-semiconductor hybrid colloid is an emerging paradigm for the construction of advanced materials having multiple functionalities. In such colloids, the ratio between the number of metal nanoparticles (NP) to the number of semiconductor quantum dots (QD) plays an important role in controlling the properties of the final hybrid colloid. We study the effect of the mixing ratio of Ag NPs to the CdTe QDs on the photoluminescence (PL) properties of the final mixed hybrid colloid. Using steady-state and time-resolved photoluminescence, it has been shown that when exciton and plasmon spectrally overlap in a hybrid, the amplitude of the decay component of PL depends on the excitation energy. Such dependence is not observed in the case of hybrid where exciton and plasmon are spectrally separated. This study contributes to the appropriate selection of the shape of metal NPs in designing a hybrid material that is well suited for optoelectronic device applications.

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