Pressure-resistance of Magic-sized Cadmium Selenide Nanocrystals

doi:10.15541/jim20200383

Abstract

Abstract:

Exploration of pressure-resistant materials largely facilitates the operation under extreme conditions where the stable structure and properties are highly desirable. Magic-sized nanocrystals (MSNs) are of great interest due to their well-defined structure, ultra-small particle size, and precise atomic composition. Here, we reported the colloidal synthesis of CdSe MSNs with a sharp first exciton absorption peak at 463 nm. The corresponding photoluminescence (PL) spectrum exhibited a very narrow full width at half-maximum (FWHM) of about 13 nm. In situ high-pressure evolutions of PL and absorption unambiguously indicated that the peak position of as-prepared CdSe MSNs kept nearly unchanged with the pressure increasing. This behavior was completely different from conventional materials upon the stimulus of external pressure. Furthermore, the decompressed samples retained the original structure and morphology of CdSe MSNs. The properties of good pressure resistance of the CdSe MSNs are reflected in the process of pressurization, which improves the research of the magic-sized materials under extreme pressure.

Key words: magic size, cadmium selenide, pressure resistance, diamond anvil cell

CLC Number:

TQ174

JIANG Hongmei, ZHAO Wenya, FU Ruijing, XIAO Guanjun. Pressure-resistance of Magic-sized Cadmium Selenide Nanocrystals[J]. Journal of Inorganic Materials, 2021, 36(5): 502-506.

Figures/Tables 4

Fig. 1 (a) Absorption spectra of time-temperature evolution of CdSe MSNs samples dispersed in toluene, (b) normalized absorption spectrum (black line, left y-axis) and emission (red line, excitation wavelength 355 nm, right y-axis) of CdSe MSNs obtained at 200 ℃/6 min, and (c) schematic of crystal structure of CdSe in wurtzite (from three different directions of a, b and c, respectively)

Fig. 2 (a) HRTEM image of CdSe MSNs with (b) corresponding selected area correlation pattern of the square in (a), (c) FFT- HRTEM image of CdSe MSNs, and (d, e) elemental mapping images of CdSe MSNs

Fig. 3 (a) High pressure photoluminescence spectra of CdSe MSNs, and (b) comparison of photoluminescence spectra of CdSe MSNs before and after compression (1 atm=101325 Pa) r0 dipicts the ambient pressure after completely releasing pressure

Fig. 4 (a) In situ high pressure UV-Vis absorption spectra, (b, c) band gap evolution of CdSe MSNs in the process of pressurization and pressure relief, and (d) HRTEM image of CdSe MSNs after the pressure relief r2.06 and r0 in (a) represent the pressure released to 2.06 GPa and ambient conditions

References 27

[1]	KUDERA S, ZANELLA M, GIANNINI C, et al. Sequential growth of magic-size CdSe nanocrystals. Advanced Materials, 2007,19(4):548-552.
[2]	YU K, OUYANG J Y, ZAMAN M B, et al. Single-sized CdSe nanocrystals with bandgap photoemission via a noninjection one-pot approach. The Journal of Physical Chemistry C, 2009,113(9):3390-3401.
[3]	OUYANG J Y, ZAMAN M B, YAN F J, et al. Multiple families of magic-sized CdSe nanocrystals with strong bandgap photoluminescence via noninjection one-pot syntheses. The Journal of Physical Chemistry C, 2008,112(36):13805-13811.
[4]	BOWERS M J, MCBRIDE J R, ROSENTHAl S J. White-light emission from magic-sized cadmium selenide nanocrystals. Journal of the American Chemical Society, 2005,127(44):15378-15379. DOI URL PMID
[5]	DAGTEPE P, CHIKAN V, JASINSKI J, et al. Quantized growth of CdTe quantum dots; observation of magic-sized CdTe quantum dots. The Journal of Physical Chemistry C, 2007,111(41):14977-14983.
[6]	DUKES A D, MCBRIDE J R, ROSENTHAL S J. Synthesis of magic-sized CdSe and CdTe nanocrystals with diisooctylphosphinic acid. Chemistry of Materials, 2010,22(23):6402-6408.
[7]	LI M, OUYANG J, RATCIFFE C I, et al. CdS magic-sized nanocrystals exhibiting bright band gap photoemission via thermodynamically driven formation. ACS Nano, 2009,3(12):3832-3838. DOI URL PMID
[8]	GAO D, HAO X Y, ROWELL N, et al. Formation of colloidal alloy semiconductor CdTeSe magic-size clusters at room temperature. Nature Communications, 2019,10(1):1674. DOI URL PMID
[9]	YANG J W, MUCKEL F, BAEK W, et al. Chemical synthesis, doping, and transformation of magic-sized semiconductor alloy nanoclusters. Journal of the American Chemical Society, 2017,139(19):6761-6770. URL PMID
[10]	CHEN M, LUAN C R, ZHANG M, et al. Evolution of CdTe magic-size clusters with single absorption The Journal of Physical Chemistry Letters, 2020,11(6):2230-2240. URL PMID
[11]	XIAO G J, WANG Y N, HAN D, et al. Pressure-induced large emission enhancements of cadmium selenide nanocrystals. Journal of the American Chemical Society, 2018,140(42):13970-13975. URL PMID
[12]	LV P F, YANG S R, LIU C, et al. Pressure-induced emission enhancements and ripening of zinc blende cadmium selenide nanocrystals. The Journal of Physical Chemistry C, 2019,123(24):15339-15344.
[13]	TOLBERT S H, ALIVISATOS A P. The wurtzite to rock salt structural transformation in CdSe nanocrystals under high pressure. The Journal of Chemical Physics, 1995,102(11):4642-4656.
[14]	SHI Y, MA Z W, ZHAO D L, et al. Pressure-induced emission (PIE) of one-dimensional organic tin bromide perovskites. Journal of the American Chemical Society, 2019,141(16):6504-6508. URL PMID
[15]	MA Z W, LIU Z, LU S Y, et al. Pressure-induced emission of cesium lead halide perovskite nanocrystals. Nature Communications, 2018,9(1):4506. URL PMID
[16]	WANG L, YANG W G, DING Y, et al. Size-dependent amorphization of nanoscale Y₂O₃ at high pressure. Phys. Rev. Lett., 2010,105(9):095701. URL PMID
[17]	QUAN Z W, WANG Y X, BAE I T, et al. Reversal of Hall-Petch effect in structural stability of PbTe nanocrystals and associated variation of phase transformation. Nano Letters, 2011,11(12):5531-5536. DOI URL PMID
[18]	QUAN Z W, LUO Z P, WANG Y X, et al. Pressure-induced switching between amorphization and crystallization in PbTe nanoparticles. Nano Letters, 2013,13(8):3729-3735. DOI URL PMID
[19]	LYASHCHOVA A, DMYTRUK A, DMITRUK I, et al. Optical absorption, induced bleaching, and photoluminescence of CdSe nanoplatelets grown in cadmium octanoate matrix. Nanoscale Research Letters, 2014,9(1):88. URL PMID
[20]	NIRMAL M, NORRIS D J, KUNO M, et al. Observation of the “dark exciton” in CdSe quantum dots. Physical Review Letter, 1995,75(20):3728-3731.
[21]	NORRIS D J, EFROS A L, ROSEN M. Size dependence of exciton fine structure in CdSe quantum dots. Physical Review B, 1996,53(24):16347-16354.
[22]	NORRIS D J, BAWENDI M G. Measurement and assignment of the size-dependent optical spectrum in CdSe quantum dots. Physical Review B, 1996,53(24):16338-16346.
[23]	NEVERS D R, WILLIAMSON C B, SAVITZKY B H, et al. Mesophase formation stabilizes high-purity magic-sized clusters. Journal of the American Chemical Society, 2018,140(10):3652-3662. URL PMID
[24]	GROENEVELD E, VAN BERKUM S, MEIJERINK A, et al. Growth and stability of ZnTe magic-size nanocrystals. Small, 2011,7(9):1247-1256. DOI URL PMID
[25]	LIU X M, JIANG Y, WANG C, et al. White-light-emitting CdSe quantum dots with “magic size” via one-pot synthesis approach. Physica Status Solidi (A), 2010,207(11):2472-2477.
[26]	EFROS A L, ROSEN M, KUNO M, et al. Band-edge exciton in quantum dots of semiconductors with a degenerate valence band: dark and bright exciton states. Physical Review B, 1996,54(7):4843-4856.
[27]	RIEHLE F S, BIENERT R, THOMANN R, et al. Blue luminescence and superstructures from magic size clusters of CdSe. Nano Letters, 2009,9(2):514-518. DOI URL PMID