Controlled doping of carbon nanotubes is elemental for their electronic applications. Here we report an approach to tune the polarity and degree of doping of single-walled carbon nanotubes via filling with nickelocene followed by encapsulated reactions. Using Raman, photoemission spectroscopy and transmission electron microscopy, we show that nickelocene molecules transform into nickel carbides...

We report that four properties of cuprates and their evolution with doping are consequences of simply counting four-site plaquettes arising from doping, (1) the universal Tc phase diagram (superconductivity between∼0.05 and ∼0.27 doping per CuO2 plane and optimal Tc at ∼0.16), (2) the universal doping dependence of the room-temperature thermopower, (3) the superconducting neutron spin resonance...

We introduce a new class of spin-on dopants composed of organic, dopant-containing polymers. These new dopants offer a hybrid between conventional inorganic spin-on dopants and a recently developed organic monolayer doping technique that affords unprecedented control and uniformity of doping profiles. We demonstrate the ability of polymer film doping to achieve both p-type and n-type silicon by...

The influence of B203 on the microshucture and magnetic properties of pure Mn-Zn ferrites has been investigated. A citrate gel processing route was employed to produce highly homogeneous Mn-Zn (MQ,~,Z~.,F~,,OJ ferrites undoped or doped with B203 (0-2.5wt%). The results show that B203 doping does not benefit the magnetic properties of these femtes, but promoted grain growth significantly. The in...

To enable preventive measures to be designed, it is important to identify modifiable distal and proximal factors underlying doping behaviour. This study investigated aspects of the prototype willingness model in relation to doping. A cross-sectional study was conducted involving 729 competitive athletes. Following ethical approval, athletes (mean age= 28.8 ± 10.1 years; 63% male) completed an o...

We present a model that describes doping-induced contrast in photoelectron emission microscopy by including the effect of surface state distributions and doping-induced band gap reduction. To quantify the contrast, the photoyield from the valence band for near-threshold photoemission is calculated as a function of p-type doping concentration in Si~001!. Various surface state distributions appro...

The insulator to metal transition in LaTiO3 induced by La substitution via Sr is studied within multiband exact diagonalization dynamical mean field theory at finite temperatures. It is shown that weak hole doping triggers a large interorbital charge transfer, with simultaneous electron and hole doping of t2g subbands. The transition is first order and exhibits phase separation between insulato...

We study the dynamics of metallic vertical stripes in cuprates within the three-band Hubbard model based on a recently developed time-dependent Gutzwiller approximation. As doping increases, the optical conductivity shows transfer of spectral weight from the charge-transfer band towards (i) an incoherent band centered at 1.3 eV, (ii) a Drude peak, due mainly to motion along the stripe, and (iii...

Given the current regulatory environment surrounding doping in the world, and in view of the recurring scandals linking leading athletes in a variety of sports with doping, this paper aims to provide some thoughts on the relationship between doping and public health, taking as base reference the risks doping poses to health and considering the regulatory options that have been adopted by the in...

The electronic properties of p-doped single-walled carbon nanotube SWNT bulk samples were studied by temperature-dependent resistivity and thermopower, optical reflectivity, and Raman spectroscopy. These all give consistent results for the Fermi level downshift EF induced by doping. We find EF 0.35 eV and 0.50 eV for concentrated nitric and sulfuric acid doping respectively. With these values, ...