The name is absent



As shown in Figure 3.2, the results obtained from the model given in Chapter 2 start
deviating from the AFM data at short tip-sample separations (11 nm and less in the figure
below).

450

400

350

300

(a) S250

200

150

100

50


°    5    10    15   20   25   30   35    40

Tip-sample separation D (nm)

Figure 3.2: (a) The fixed charged density model is a good fit for the data for D > 11 nm.
(b) A closer view of the same data shown in (a) reveals that the simulation deviates from
the data when
D < 11 nm. The data is for a 1:5, DOPC:DOPS mixture.


The fixed surface charge density model of Chapter 2 consistently over-estimates the force
in the short-range. Thus, we reason that the short-range correction must be due to a
lessening in repulsion between the tip and the lipid. We will first show that the van der
Waals interaction between the tip and the sample does not account for the observed short
ranged deviation. Next, we will demonstrate that the AFM tip-induced counterion

28



More intriguing information

1. AGRICULTURAL TRADE LIBERALIZATION UNDER NAFTA: REPORTING ON THE REPORT CARD
2. THE INTERNATIONAL OUTLOOK FOR U.S. TOBACCO
3. The Determinants of Individual Trade Policy Preferences: International Survey Evidence
4. Reversal of Fortune: Macroeconomic Policy, International Finance, and Banking in Japan
5. The name is absent
6. The name is absent
7. Testing Hypotheses in an I(2) Model with Applications to the Persistent Long Swings in the Dmk/$ Rate
8. The name is absent
9. ISO 9000 -- A MARKETING TOOL FOR U.S. AGRIBUSINESS
10. Foreign Direct Investment and Unequal Regional Economic Growth in China