Sol–gel synthesis of doped Cu2V2O7 fine particles showing giant negative thermal expansion

Sato, Mitsumasa; Warne-Lang, V.; Kadowaki, Y.; Katayama, Naoyuki; Takenaka, K.

doi:10.1063/5.0010631

Cited by 16 publications

(6 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the above growth procedure, single crystals of β-Cu 2 V 2 O 7 with a size of 3 × 3 × 5 mm 3 were obtained by mechanical separation from the crucible. Alternative synthesis methods for β-Cu 2 V 2 O 7 also exist. , …”

Section: Methodsmentioning

confidence: 99%

Pressure-Induced Phase Transition and Band Gap Decrease in Semiconducting β-Cu₂V₂O₇

et al. 2022

View full text Add to dashboard Cite

The understanding of the interplay between crystal structure and electronic structure in semiconductor materials is of great importance due to their potential technological applications. Pressure is an ideal external control parameter to tune the crystal structures of semiconductor materials in order to investigate their emergent piezo-electrical and optical properties. Accordingly, we investigate here the high-pressure behavior of the semiconducting antiferromagnetic material β-Cu 2 V 2 O 7 , finding it undergoes a pressure-induced phase transition to γ-Cu 2 V 2 O 7 below 4000 atm. The pressure-induced structural and electronic evolutions are investigated by single-crystal X-ray diffraction, absorption spectroscopy and ab initio density functional theory calculations. β-Cu 2 V 2 O 7 has previously been suggested as a promising photocatalyst for water splitting. Now, these new results suggest that β-Cu 2 V 2 O 7 could also be of interest with regards to barocaloric effects, due to the low phase -transition pressure, in particular because it is a multiferroic material. Moreover, the phase transition involves an electronic band gap decrease of approximately 0.2 eV (from 1.93 to 1.75 eV) and a large structural volume collapse of approximately 7%.

show abstract

Section: Methodsmentioning

confidence: 99%

Pressure-Induced Phase Transition and Band Gap Decrease in Semiconducting β-Cu₂V₂O₇

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Gd 2 O 3 particles doped with Eu 3+ ions were synthesized using raw oxide via the modified Pechini method, which ensures a uniform distribution of the emissive ions at the atomic level . The CL intensity map in Figure S7 shows that Eu 3+ ions are uniformly distributed over the entire particle.…”

Section: Methodsmentioning

confidence: 99%

Nanoscale Cathodoluminescence Thermometry with a Lanthanide-Doped Heavy-Metal Oxide in Transmission Electron Microscopy

Park,

Olshin,

Kim

et al. 2024

ACS Nano

View full text Add to dashboard Cite

When navigated by the available energy of a system, often provided in the form of heat, physical processes or chemical reactions fleet on a free-energy landscape, thus changing the structure. In in situ transmission electron microscopy (TEM), where material structures are measured and manipulated inside the microscope while being subjected to external stimuli such as electrical fields, laser irradiation, or mechanical stress, it is necessary to precisely determine the local temperature of the specimen to provide a comprehensive understanding of material behavior and to establish the relationship among energy, structure, and properties at the nanoscale. Here, we propose using cathodoluminescence (CL) spectroscopy in TEM for in situ measurement of the local temperature. Gadolinium oxide particles doped with emissive europium ions present an opportunity to utilize them as a temperature probe in CL measurements via a ratiometric approach. We show the thermometric performance of the probe and demonstrate a precision of ±5 K in the temperature range from 113 to 323 K with the spatial resolution limited by the size of the particles, which surpasses other methods for temperature determination. With the CL-based thermometry, we further demonstrate measuring local temperature under laser irradiation.

show abstract

“…Despite the commendable progress in this realm, the specific influence of doped copper vanadates is mostly restricted to photoanode, supercapacitor, battery, and photocatalyst-based applications. [29][30][31][32][33] The potential of these otherwise unusual materials has been rarely probed for electrochemical reductions (cathodic) and organic molecule oxidations.…”

Section: Introductionmentioning

confidence: 99%

Cobalt-doped copper vanadate: a dual active electrocatalyst propelling efficient H₂ evolution and glycerol oxidation in alkaline water

et al. 2023

View full text Add to dashboard Cite

show abstract

Sol–gel synthesis of doped Cu2V2O7 fine particles showing giant negative thermal expansion

Cited by 16 publications

References 39 publications

Pressure-Induced Phase Transition and Band Gap Decrease in Semiconducting β-Cu₂V₂O₇

Pressure-Induced Phase Transition and Band Gap Decrease in Semiconducting β-Cu₂V₂O₇

Nanoscale Cathodoluminescence Thermometry with a Lanthanide-Doped Heavy-Metal Oxide in Transmission Electron Microscopy

Cobalt-doped copper vanadate: a dual active electrocatalyst propelling efficient H₂ evolution and glycerol oxidation in alkaline water

Contact Info

Product

Resources

About

Sol–gel synthesis of doped Cu2V2O7 fine particles showing giant negative thermal expansion

Cited by 16 publications

References 39 publications

Pressure-Induced Phase Transition and Band Gap Decrease in Semiconducting β-Cu2V2O7

Pressure-Induced Phase Transition and Band Gap Decrease in Semiconducting β-Cu2V2O7

Nanoscale Cathodoluminescence Thermometry with a Lanthanide-Doped Heavy-Metal Oxide in Transmission Electron Microscopy

Cobalt-doped copper vanadate: a dual active electrocatalyst propelling efficient H2 evolution and glycerol oxidation in alkaline water

Contact Info

Product

Resources

About

Pressure-Induced Phase Transition and Band Gap Decrease in Semiconducting β-Cu₂V₂O₇

Pressure-Induced Phase Transition and Band Gap Decrease in Semiconducting β-Cu₂V₂O₇

Cobalt-doped copper vanadate: a dual active electrocatalyst propelling efficient H₂ evolution and glycerol oxidation in alkaline water