Magnetic Ordering in Fe0.008Ge1 − x D x (D = As, Bi)

Abstract

The formation of local moments and the effect of charge carriers in dilute magnetic semiconductors can be well understood using local probe techniques like Mossbauer Spectroscopy. We report here on Mossbauer studies in the systems Fe 0.008 Ge 1jx D x (D = As, Bi), Fe 0.008 Ge 1jx In x , and Fe 0.008 Ge 1 j x Sn x . At room temperature magnetic interactions were observed for donor (D) impurities at the Fe site in the Fe 0.008 Ge system. No such magnetic ordering was observed for acceptor (In) or neutral (Sn) impurities.

Analysis of Interactions between the Epidermal Growth Factor Receptor and Soluble Ligands on the Basis of Single‐Molecule Diffusivity in the Membrane of Living Cells

“…To demonstrate the quantitative aspect of smDIMSA (see the Supporting Information for details), we measured the dissociation constant (K d )o ft he interaction between EGFR and cetuximab in aCOS7 cell membrane.F rom the stepwise EGFR diffusion-coefficient shifts that occurred in response to the dose-dependent sequential addition of cetuximab,w e extracted the ratios of the cetuximab-bound EGFR at each cetuximab concentration to calculate the K d value of the interaction between cetuximab and EGFR as well as the binding cooperativity (see Figure S17). The K d value of cetuximab binding to EGFR was (0.62 AE 0.19) nm,w hich is similar to the in vitro K d value of cetuximab binding to the ECD of EGFR [13] (Figure 5a). AScatchard plot revealed that there was no cooperativity in the binding of cetuximab to EGFR, which is consistent with the results of previous in vitro studies.…”

“…AScatchard plot revealed that there was no cooperativity in the binding of cetuximab to EGFR, which is consistent with the results of previous in vitro studies. [13] Thec etuximab-bound "EGFR fraction" obtained by smDIMSA can be complementary to the EGFR-bound "cetuximab fraction" measured by labeling cetuximab at the single-cell level. [14] In contrast to EGFR WT,w ef ound that the interaction between EGFR L858R, which is amutant frequently found in cancers,a nd cetuximab on the membrane of COS7 cells exhibited strong positive cooperativity (Figure 5b).…”

Transition from paramagnetism to ferromagnetism through additional hole doping of non-magnetic antimony in iron doped tellurium alloy

“…Not much heed has been given to elemental semiconductors in terms of exploring its probability as a potential dilute magnetic semiconductor. Past studies on germanium explored its possibilities for applications in spintronics [1][2][3][4].…”