The fabrication of self-catalyzed InP nanowires(NWs)is investigated under different growth conditions.Indium droplets induced by surface reconstruction act as nucleation sites for NW growth.Vertical standing NWs with ...The fabrication of self-catalyzed InP nanowires(NWs)is investigated under different growth conditions.Indium droplets induced by surface reconstruction act as nucleation sites for NW growth.Vertical standing NWs with uniform cross sections are obtained under optimized conditions.It is confirmed that the growth rate of NWs is strongly affected by the surface diffusion adatoms while contributions from the direct impingement of vapor species onto the In droplets can be negligible.The results indicate that the droplet acts as an adatom collector rather than a catalyst.Moreover,the diffusion flow rate of adatoms increases with time at the beginning of growth and stabilizes as the growth proceeds.展开更多
A 2D layer Cu(Ⅱ) coordination polymer [Cu(npth)(H_(2)O)]n(1) was crystallized from a mixture of 3-nitrophthalic acid and Cu(OAc)_(2)·H_(2)O in water under room temperature and structurally characterized by singl...A 2D layer Cu(Ⅱ) coordination polymer [Cu(npth)(H_(2)O)]n(1) was crystallized from a mixture of 3-nitrophthalic acid and Cu(OAc)_(2)·H_(2)O in water under room temperature and structurally characterized by single-crystal X-ray diffraction, FT-IR and TGA. Compound 1 was applied to make a nanocomposite with graphene oxide(GO). A highly dispersible and stable nanocomposite of Cu(npth)-GO was successfully synthesized by a simple ultrasonication method. SEM, TEM, UV-vis, FT-IR and TGA were used to characterize the morphology and structure of the prepared composite. In accordance with the characterization results, we suspected that the binding mechanism of Cu(npth) and GO was assigned to be the cooperative interaction of Cu–O coordination, π-π stacking and hydrogen bonding.展开更多
基金Supported by the National Basic Research Program of China(2010CB327600)the National Natural Science Foundation of China(61020106007,61077049)+1 种基金New Century Excellent Talents in University(NCET-08-0736)the 111 Program of China(B07005).
文摘The fabrication of self-catalyzed InP nanowires(NWs)is investigated under different growth conditions.Indium droplets induced by surface reconstruction act as nucleation sites for NW growth.Vertical standing NWs with uniform cross sections are obtained under optimized conditions.It is confirmed that the growth rate of NWs is strongly affected by the surface diffusion adatoms while contributions from the direct impingement of vapor species onto the In droplets can be negligible.The results indicate that the droplet acts as an adatom collector rather than a catalyst.Moreover,the diffusion flow rate of adatoms increases with time at the beginning of growth and stabilizes as the growth proceeds.
基金Supported by the National Natural Science Foundation of China (No.22001064)the Natural Science Foundation of Hunan Province (No.2020JJ4155)+1 种基金the 2020 Hunan Province College Students’Innovation Entrepreneurship Training Program (No.3373)the Scientific Research Project of Hunan Province Department of Education (No.20B105)。
文摘A 2D layer Cu(Ⅱ) coordination polymer [Cu(npth)(H_(2)O)]n(1) was crystallized from a mixture of 3-nitrophthalic acid and Cu(OAc)_(2)·H_(2)O in water under room temperature and structurally characterized by single-crystal X-ray diffraction, FT-IR and TGA. Compound 1 was applied to make a nanocomposite with graphene oxide(GO). A highly dispersible and stable nanocomposite of Cu(npth)-GO was successfully synthesized by a simple ultrasonication method. SEM, TEM, UV-vis, FT-IR and TGA were used to characterize the morphology and structure of the prepared composite. In accordance with the characterization results, we suspected that the binding mechanism of Cu(npth) and GO was assigned to be the cooperative interaction of Cu–O coordination, π-π stacking and hydrogen bonding.
