Lead Selenide Nanowires Prepared by Lithographically Patterned Nanowire Electrodeposition

Abstract

We describe the electrochemical deposition of lead selenide (PbSe) nanowire arrays by the lithographically patterned nanowire electrodeposition (LPNE) method. The nanowires were electrodeposited using a constant potential method from an aqueous solution containing Pb2+ and HSeO3 − at room temperature onto an electrode that had been photopatterned in unfiltered laboratory air. The resulting polycrystalline nanowires were stoichometric, face-centered cubic PbSe and had a rectangular cross section with lengths > 1 mm, widths between 80 and 600 nm, and heights between 40 and 80 nm. The synthesized nanowires were characterized by scanning electron microscopy (SEM), energy dispersive X-ray fluorescence (EDX), transmission electron microscopy (TEM), selected area electron diffraction (SAED), and powder X-ray diffraction (XRD). The electrical resistivity of the nanowires is comparable to that of other PbSe nanowires.

Controllable synthesis and electrochemical hydrogen storage properties of Sb2Se3 ultralong nanobelts with urchin-like structures

“…0.379 nm and 0.821 nm, corresponding to the lattice spacings of the (101) and (110) planes for orthorhombic structure Sb 2 Se 3 , respectively. Additionally, The HRTEM pattern shows that the belt structure of Sb 2 Se 3 is preferentially oriented along the [1][2][3][4][5][6][7][8][9][10][11][12] direction. Meanwhile, the angle between the (101) and (110) plane is 77 , in agreement with the calculated result according to its crystal structure.…”

“…1,2 And a lot of efforts have been made to explore the dimensional regime of nanomaterials by chemist and material scientists. In the past two decades, numerous micro-or nano-materials with different sizes and morphologies have been synthesized, such as Bi 2 WO 6 and ZnIn 2 S 4 microspheres, [3][4][5] Fe 3 O 4 nanotubes, 6 ZnSe and Sb 2 Te 3 nanobelts, 7,8 FePt nanorods, 9 PbSe and Ag 2 Se nanowires, [10][11][12] etc. Among these materials, 1D nanomaterials including nanotubes, nanowires, nanobelts, and nanorods, have attracted considerable attention because of their unique structural one dimensionality and possible quantum confinement effects in two dimensions, which are expected to play a key role as building blocks for the future nanoscale devices.…”

Atomistic study of electronic structure of PbSe nanowires

“…It is used extensively in optical devices [3,6], lasers [7,8] and thermoelectric devices [4,9,10]. The large Bohr exciton radius of about 46nm in PbSe makes it a suitable system to study quantum confinement effects on electrons and holes [6,[11][12][13]. Recent progress in multiple exciton generation (MEG) in PbSe with higher optical efficiency has renewed interest in the optical properties of PbSe [5].…”

“…PbSe NW growth technologies: With recent advances in the growth and process technology, the fabrication of PbSe NWs have become very efficient and controlled. PbSe NWs are developed using a variety of methods like, chemical vapor transport (CVT) method [9], oriented nano-particle attachment [11], electro-deposition without catalyst [12] and with catalyst [17], hyper-branching [18], growing PbSe structures on phosphate glass [19], etc. These methods enable PbSe NWs fabrication with a variety of growth directions and surfaces.…”

Template-Assisted Electrochemical Synthesis of Semiconductor Nanowires

“…(Step 8) The PbTe NW is electrodeposited into the trench, (Step 9) the previously exposed top-PR layer is removed using developer, (Step 10) the nickel layer is removed by etching in HNO 3 leaving freestanding PbTe NWs on top of an intact and unexposed layer of bottom-PR, (Step 11) this bottom PR layer is exposed as before, (Step 12) the exposed PR is removed leaving suspended PbTe NW segments up to 25 µm in length [78]. This method could also be used to grow NWs of CdSe [49] and PbSe [79].…”