Thickness-Dependent Nonlinear Electrical Conductivity of Few-Layer Muscovite Mica

Arora, Ankit; Ganapathi, K.; Dixit, Tejendra; Muralidhar, M.; Murakami, Masato; Rao, M. S. Ramachandra; Krishnan, A.

doi:10.1103/physrevapplied.17.064042

Cited by 6 publications

(8 citation statements)

References 45 publications

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“…It is found that the potential ( V 0–1 and V 0–2 ) of the micro-regions (MR 1 and MR 2 ) in x = 0 is smaller than V 0.15 . According to the KPFM principle, as the voltage is applied on the tip, the contact potential difference (CPD) can be calculated according to the formula: 57 where ϕ s and ϕ t are the work functions of the sample and tip respectively, V s and V t are the potentials of the sample and tip respectively, and e is the electric quantity of electrons. Thus, the work function of the sample can be obtained using: ϕ s = e ( V s − V t ) + ϕ t .…”

Section: Resultsmentioning

confidence: 99%

“…Compared with x = 0.15, multiple micro-regions of x = 0 with smaller work functions exhibit a movement of E f toward the energy level of the conduction band ( E c ), indicating an increase in the carrier density of the conduction band. 57 Therefore, some micro-regions in x = 0 have higher conductivity, exhibiting obvious heterogeneity of the structure, which may be the key reason for the low BDS. It can be concluded that LMZ improves the homogeneity of micro-regions, restraining the formation of micro-regions with high conductivity.…”

Section: Resultsmentioning

confidence: 99%

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High-performance energy-storage ferroelectric multilayer ceramic capacitors via nano-micro engineering

Zhao

et al. 2023

J. Mater. Chem. A

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

High-performance energy-storage ferroelectric multilayer ceramic capacitors via nano-micro engineering

Zhao

et al. 2023

J. Mater. Chem. A

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“…Past research has shown that smaller nanosheets are ideal for catalytic applications due to the abundance of edge sites that propagate reactions. [ 33 ] We believe that with the small areal size associated with our phyllosilicate nanosheets and a recent observation that work function will decrease with layer number, [ 34 ] micene and chlorene would be ideal candidates for highly effective HER electrochemical electrodes. By transferring filtered networks of phyllosilicate nanosheets onto glassy carbon, we created electrodes with constant density and thickness across all materials.…”

Section: Resultsmentioning

confidence: 99%

Exotic Electronic Properties of 2D Nanosheets Isolated from Liquid Phase Exfoliated Phyllosilicate Minerals

Wei,

Roy,

Tripathi

et al. 2023

Advanced Materials

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Spectrally inactive, electrically insulating, and chemically inert are adjectives broadly used to describe phyllosilicate minerals like mica and chlorite. Here, the above is disproved by demonstrating aqueous suspensions of liquid exfoliated nanosheets from five bulk mica types and chlorite schist. Nanosheet quality is confirmed via transmission electron and X‐ray photoelectron spectroscopies, as well as electron diffraction. Through Raman spectroscopy, a previously unreported size‐ and layer‐dependent spectral fingerprint is observed. When analyzing the high‐yield suspensions (≈1 mg mL−1) through UV–vis spectroscopy, all phyllosilicates present bandgap (Eg) narrowing from ≈7 eV in the bulk to ≈4 eV for monolayers. Unusually, the bandgap is inversely proportional to the areal size (A) of the nanosheets, measured via atomic force microscopy. Due to an unrecorded quantum confinement effect, nanosheet electronic properties scale toward semiconducting behavior (bandgap ≈3 eV) as nanosheet area increases. Furthermore, modeling X‐ray diffraction spectra shows that the root cause of the initial bandgap narrowing is lattice relaxation. Finally, with their broad range of isomorphically substituted ions, phyllosilicate nanosheets show remarkable catalytic properties for hydrogen production.

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“…Similar experiments have been also performed in other phyllosilicates. 43,47,145 Fig. 2(c) presents the magnetic properties of Fe-rich talc down to 1L.…”

Section: Electronic and Optoelectronic Applicationsmentioning

confidence: 99%

Phyllosilicates as earth-abundant layered materials for electronics and optoelectronics: Prospects and challenges in their ultrathin limit

Barcelos,

de Oliveira,

Schleder

et al. 2023

Journal of Applied Physics

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Phyllosilicate minerals are an emerging class of naturally occurring layered insulators with large bandgap energy that have gained attention from the scientific community. This class of lamellar materials has been recently explored at the ultrathin two-dimensional level due to their specific mechanical, electrical, magnetic, and optoelectronic properties, which are crucial for engineering novel devices (including heterostructures). Due to these properties, phyllosilicate minerals can be considered promising low-cost nanomaterials for future applications. In this Perspective article, we will present relevant features of these materials for their use in potential 2D-based electronic and optoelectronic applications, also discussing some of the major challenges in working with them.

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Thickness-Dependent Nonlinear Electrical Conductivity of Few-Layer Muscovite Mica

Cited by 6 publications

References 45 publications

High-performance energy-storage ferroelectric multilayer ceramic capacitors via nano-micro engineering

High-performance energy-storage ferroelectric multilayer ceramic capacitors via nano-micro engineering

Exotic Electronic Properties of 2D Nanosheets Isolated from Liquid Phase Exfoliated Phyllosilicate Minerals

Phyllosilicates as earth-abundant layered materials for electronics and optoelectronics: Prospects and challenges in their ultrathin limit

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