One-Pot Synthesis of Liquid Hg/Solid β-HgS Metal−Semiconductor Heterostructures with Unique Electrical Properties

Abstract

Liquid metal-solid semiconductor heterostructures, Hg heads combined with single-crystalline β-HgS tails, with controllable sizes and well-defined interfaces have been fabricated for the first time via one-pot synthesis. Such heterostructures can exist in water with good stability due to coordination adsorption of cysteine molecules onto the surface of both Hg and HgS through Hg-S bonds. Two-probe current-voltage curve measurements reveal that good ohmic contacts without additional resistance contacts are generated at the interfaces of Hg/β-HgS heterostructures. Only existence of ohmic contacts offers many potential applications of metal-semiconductor heterostructures in minimization of electronic devices.

Self‐Assembled Manganese Sulfide Nanostructures on Graphene as an Oxygen Reduction Catalyst for Anion Exchange Membrane Fuel Cells

“…[34] I D /I G ratios which gives quantification of surface defects, are calculated for graphene, MnS/G (40 %), MnS/G (50 %) and MnS/G (60 %), and the values are 1.14, 1.23, 1.33, and 1.48, respectively. [37] These clusters decompose under pressurized condition to form sub-micron to micro-sized MnS structures. Figure 3a-c show FE-SEM images of MnS/G (40 %), MnS/G (50 %) and MnS/G (60 %) hybrid catalysts, respectively.…”

“…L-cysteine is a well-known amino acid with more number of active functional groups such as -NH 2 , -COOH and -SH and they have a strong tendency to coordinate with inorganic cations like Mn 2 + to form metal-ligand clusters. [37] These clusters decompose under pressurized condition to form sub-micron to micro-sized MnS structures. In order to visualize MnS particle distribution on to graphene support, low magnification FE-SEM images have acquired and shown in Figure S1 (See supporting information).…”

Controllable synthesis of floatable nanocrystalline Ag2S and Ag by a silane coupling agent-modified solvothermal method

“…Firstly, prior to the solvothermal process, Ag(I) reacts easily with thiolate anion or NH 2 -groups of SCAs [43], which effectively controls the Ag + concentration by forming the Ag(I)-thiolate (or -NH 2 -) complex. Wu et al [44] reported the synthesis of smallsized Hg and HgS by formation of Hg(II)-thiolate complex, by controlling Hg 2+ concentration in the solution. Thus, we suppose that the small-sized Ag or Ag 2 S have a similar formation process.…”

Protein‐Directed Synthesis of NIR‐Emitting, Tunable HgS Quantum Dots and their Applications in Metal‐Ion Sensing

“…In the past decade, semiconductor quantum dots (QDs) have become well‐established photoluminescent platforms for many scientific and industrial applications 1–3. For example, QDs are highly sensitive to charge/energy transfer, which can alter their optical properties, thus generating interest in charge/energy‐transfer‐based bio‐sensing 1, 4.…”

“…Luminescence across the visible spectral region with mercury chalcogenide is extremely difficult, while it is common for zinc‐ and cadmium‐based chalcogenides. Despite the potential toxicity of mercury and the restricted application in biology, it would be of great interest to develop mercury chalcogenide QDs with tunable luminescence as there is immense potentiality in their application in chemical sensing, infrared detection, and in the development of electrical devices 2, 5, 6…”