Boosting in-plane Anisotropy by Periodic Phase Engineering in Two-dimensional VO2 Single Crystals

Triclinic single crystals of Cu2(H2O)4[C4H4N2][C6H2(COO)4]·2H2O have been grown in anaqueous silica gel. Space group P-1 (Nr. 2), a = 723.94(7) pm, b = 813.38(14) pm, c = 931.0(2) pm, α = 74.24(2)°, β = 79.24(2)°, γ = 65.451(10)°, V = 0.47819(14) nm3, Z = 1. Cu2+ is coordinated in a distorted, octahedral manner by two water molecules, three oxygen atoms ofthe pyromellitate anions and one nitrogen atom of pyrazine (Cu—O 194.1(2)–229.3(3) pm;Cu–N 202.0(2) pm). The connection of Cu2+ and [C6H2(COO)4)]4− yields infinite strands,which are linked by pyrazine molecules to form a two-dimensional coordination polymer.Thermogravimetric analysis in air showed that the dehydrated compound was stable between175 and 248 °C. Further heating yielded CuO.

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Crystal Structure of Eu2PdSi3

Zeitschrift für Naturforschung B ◽

10.1515/znb-2003-1007 ◽

2003 ◽

Vol 58 (10) ◽

pp. 971-974 ◽

Cited By ~ 13

Author(s):

U. Ch. Rodewald ◽

R.-D. Hoffmann ◽

R. Pöttgen ◽

E.V. Sampathkumaran

Keyword(s):

Crystal Structure ◽

Single Crystal ◽

Single Crystals ◽

Two Dimensional ◽

Silica Tube ◽

Variable Parameters ◽

X Ray

Single crystals of Eu2PdSi3 were obtained from an arc-melted sample that was further annealed at 1020 K for seven days in a silica tube. The structure of Eu2PdSi3 was refined from single crystal X-ray diffractometer data: P6/mmm, a = 831.88(12), c = 435.88(9) pm, wR2 = 0.1175, 265 F2 values, and 13 variable parameters. It crystallizes with the U2RuSi3 structure, a superstructure of the AlB2 type. The palladium and silicon atoms form a planar two-dimensional [PdSi3] network. The two crystallographically different europium atoms have hexagonal prismatic coordinations Eu1Si12 and Eu2Pd4Si8. The Pd-Si and Si-Si distances within the [PdSi3] network are 244 and 236 pm, respectively.

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Scalable printing of two-dimensional single crystals of organic semiconductors towards high-end device applications

Applied Physics Express ◽

10.35848/1882-0786/ac435a ◽

2021 ◽

Author(s):

Shohei Kumagai ◽

Tatsuyuki Makita ◽

Shun Watanabe ◽

Jun Takeya

Keyword(s):

Single Crystals ◽

Organic Semiconductors ◽

Materials Science ◽

Printed Electronics ◽

Human Society ◽

Two Dimensional ◽

Organic Thin Film ◽

Device Applications ◽

High Carrier Mobility ◽

High Carrier

Abstract The past several decades have witnessed a vast array of developments in printable organic semiconductors, where successes both in synthetic chemistry and in printing technology constituted a key step forward to realization of printed electronics. In this review, we highlight specifically on materials science, charge transport, and device engineering of —two-dimensional single crystals—. Defect-free organic single-crystalline wafers manufactured via a one-shot printing process allows remarkably reliable implementations of organic thin-film transistors with decently high carrier mobility up to 10 cm2 V-1 s-1, which has revolutionized the current printing electronics to be able to meet looming IoT challenges. This review focuses on the perspective of printing two-dimensional single crystals with reasonable areal coverage, showing their promising applications for practical devices and future human society, particularly based on our recent contributions.

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