Quantum dots improve peptide detection in MALDI MS in a size dependent manner

Table 2 Quantum dot mixtures used to assist MALDI-TOF analysis

QD mixture	CdSe/ZnS Core/Shell "EviDots" quantum dots used (mixed 50:50% v/v)^b	QD emissionof the mixtures, nm^c
QD0	none added	n/a
QD1	ED-C11-TOL-0520 (517 nm) + ED-C11-TOL-0540 (544 nm)	519 nm (Ex = 337 nm)^d 520/539 nm (double peak, Ex = 380 nm)
QD2	ED-C11-TOL-0560 (566 nm) + ED-C11-TOL-0580 (579 nm)	575 nm (Ex = 337 nm)^d 575 nm (Ex = 380 nm)
QD3	ED-C11-TOL-0600 (598 nm) + ED-C11-TOL-0620 (615 nm)	614 nm (Ex = 337 nm)^d 614 nm (Ex = 380 nm)

^asee Methods for further details
^bemission measured using excitation at 380 nm
^cexcitation wavelength as specified
^dexcitation at 337 nm corresponds to the wavelength of the nitrogen laser used for MALDI experiments

ISSN: 1477-3155