The structural, electronic and optical properties of γ-glycine under pressure: a first principles study

Mei, Aaron

doi:10.1039/c8ra08547a

Cited by 10 publications

(6 citation statements)

References 36 publications

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“…[34] glycine at ambient and high pressures was attempted many times. [48][49][50][51][52] Some recent papers propose the structures of some new polymorphs, but their existence has never been confirmed experimentally. [53,54] In all the glycine polymorphs there is a common structureforming motif -a head-to-tail hydrogen-bonded chain formed by the glycine zwitter-ions (Figure 4a).…”

Section: Figurementioning

confidence: 99%

Glycine: The Gift that Keeps on Giving

Boldyreva

2021

Israel Journal of Chemistry

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Glycine is a small molecule. It cannot change its conformation and is achiral. Despite the apparent simplicity, glycine shows endless diversity in its behavior over many phenomena. It was the first amino acid for which polymorphism was reported, first on crystallization and then on hydrostatic compression. The polymorphs differ in their physical properties and their biological activity. Glycine clusters persist in solution, leading to "solution memory". Phenomena at interfaces are critically important for crystal growth, dissolution, and for physical properties, which can be at times unexpected, like polarity in centrosymmetric αpolymorph. It is a great pleasure to remind of these remarkable phenomena in a special issue honoring professors Meir Lahav and Leslie Leiserowitz, who pioneered the study of the behavior of this unique molecule in many respects, and showed how complex and non-trivial phenomena can be at interfaces: between phases and between research fields.

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Section: Figurementioning

confidence: 99%

Glycine: The Gift that Keeps on Giving

Boldyreva

2021

Israel Journal of Chemistry

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“…Semiconductive properties have been studied not only in piezoelectric peptides, but also in piezoelectric amino acids and proteins. The bandgap for a γ -glycine crystal was calculated as 5.02 eV, indicating insulation characteristics [111]. However, some previous studies revealed that proteins possessed inherent conductivity properties [112–114].…”

Section: Properties and Applications Of Peptide And Metabolite Matmentioning

confidence: 99%

Piezoelectric Peptide and Metabolite Materials

et al. 2019

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Piezoelectric materials are important for many physical and electronic devices. Although many piezoelectric ceramics exhibit good piezoelectricity, they often show poor compatibility with biological systems that limits their biomedical applications. Piezoelectric peptide and metabolite materials benefit from their intrinsic biocompatibility, degradability, and convenient biofunctionalization and are promising candidates for biological and medical applications. Herein, we provide an account of the recent progress of research works on piezoelectric peptide and metabolite materials. This review focuses on the growth mechanism of peptide and metabolite micro- and nanomaterials. The influence of self-assembly processes on their piezoelectricity is discussed. Peptide and metabolite materials demonstrate not only outstanding piezoelectric properties but also unique electronic, optical, and physical properties, enabling their applications in nanogenerators, sensors, and optical waveguiding devices.

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“…Computation method. The theoretical calculation was performed using the CASTEP module of Material Studio [ 26 , 27 , 28 ]. A four-layer supercell of 2

2 with a vacuum layer thickness of 13 Å was used to simulate the surface of the catalyst.…”

Section: Methodsmentioning

confidence: 99%

Homogenous Cr and C Doped 3D Self-Supporting NiO Cellular Nanospheres for Hydrogen Evolution Reaction

Tan

Wang

et al. 2022

Materials

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Hydrogen evolution reaction (HER) is one promising technique to obtain high-purity hydrogen, therefore, exploiting inexpensive and high-efficiency HER electrocatalysts is a matter of cardinal significance under the background of achieving carbon neutrality. In this paper, a hydrothermal method was used to prepare the Cr-NiC2O4/NF (Ni foam) precursor. Then, the NiO-Cr-C/NF self-supporting HER catalyst was obtained by heating the precursor at 400 °C. The catalyst presents a 3D cellular nanospheres structure which was composed of 2D nanosheets. Microstructure characterization shows that Cr and C elements were successfully doped into NiO. The results of electrochemical measurements and density functional theory (DFT) calculations show that under the synergy of Cr and C, the conductivity of NiO was improved, and the Gibbs free energy of H* (∆GH*) value is optimized. As a result, in 1.0 M KOH solution the NiO-Cr-C/NF-3 (Ni:Cr = 7:3) HER catalyst exhibits an overpotential of 69 mV and a Tafel slope of 45 mV/dec when the current density is 10 mA·cm−2. Besides, after 20 h of chronopotentiometry, the catalytic activity is basically unchanged. It is demonstrated that C and Cr co-doping on the lattice of NiO prepared by a simple hydrothermal method and subsequent heat treatment to improve the catalytic activity and stability of the non-precious metal HER catalysts in an alkaline medium is facile and efficient.

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The structural, electronic and optical properties of γ-glycine under pressure: a first principles study

Abstract: The crystallized amino acid γ-glycine is a large band gap insulator that shows promise in the fields of photonics and non-linear optics.

Cited by 10 publications

References 36 publications

Glycine: The Gift that Keeps on Giving

Glycine: The Gift that Keeps on Giving

Piezoelectric Peptide and Metabolite Materials

Homogenous Cr and C Doped 3D Self-Supporting NiO Cellular Nanospheres for Hydrogen Evolution Reaction

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