Core–Shell PbI₂@WS₂ Inorganic Nanotubes from Capillary Wetting

Abstract

Multiwall WS2 nanotube templates were used as hosts to prepare core–shell PbI2@WS2 nanotubes by a capillary‐wetting method. Conformal growth of PbI2 layers on the inner wall of the relatively wide WS2 nanotubes (i.d. ca. 10 nm) leads to nanotubular structures which were not previously observed in narrow carbon nanotube templates. Image simulation after structural modeling (see picture) showed good agreement with the experimental HRTEM image.

Single layer lead iodide: computational exploration of structural, electronic and optical properties, strain induced band modulation and the role of spin–orbital-coupling

“…Various forms of PbI 2 including thin films, nano-clusters, multiwalled nanotubes of lead iodide have been experimentally explored [34][35][36][37][38] . The successful growth of single-layered PbI 2 nanotubes within the carbon nanotubes was reported in most recent experiment 39 .…”

Capillary Imbibition of Gadolinium Halides into WS2 Nanotubes: a Molecular Dynamics View

“…Capillary filling has been extended for the case of inorganic nanotubes, including sulfides WS 2 and MoS 2 . The filling of sulfide nanotubes can differ from that of CNTs ,. Due to the higher strain energies of inorganic nanotubes, their diameters are an order of magnitude larger than those of CNTs, which may facilitate the formation of not only nanowires, but also nanotubes of the encapsulated compound, by wetting the inner surface.…”

“…Due to the higher strain energies of inorganic nanotubes, their diameters are an order of magnitude larger than those of CNTs, which may facilitate the formation of not only nanowires, but also nanotubes of the encapsulated compound, by wetting the inner surface. Experimental studies on the cooling of PbI 2 BiI 3 , and SbI 3 melts within WS 2 nanotubes indicated the formation of core‐shell heterostructures – nanotubes of layered iodides inside sulfide nanotubes (PbI 2 @WS 2 , BiI 3 @WS 2 , and SbI 3 @WS 2 ) ,. The encapsulation of non‐layered salts like CsI into WS 2 nanotubes reveals the formation of nanowires only .…”

Controlled Synthesis of Core–Shell Carbon@MoS2 Nanotube Sponges as High‐Performance Battery Electrodes

“…Early efforts have focused on using a tubular template to confine the formation of nanowires or nanotubes. For example, PbI 2 nanotubes have been synthesized within the inner cavities of WS 2 nanotubes or carbon nanotubes (CNTs) by capillary wetting . In order to facilitate precursor penetration, the nanotube ends must be opened and a long‐term thermal annealing process (up to 1 month) is usually carried out .…”

“…For example, PbI 2 nanotubes have been synthesized within the inner cavities of WS 2 nanotubes or carbon nanotubes (CNTs) by capillary wetting . In order to facilitate precursor penetration, the nanotube ends must be opened and a long‐term thermal annealing process (up to 1 month) is usually carried out . As the growth process is confined within a nanotube template, the diameter of the target nanotubes, their structural continuity, and their uniformity will be influenced by the channel size of the template.…”