Stamp soft lithography

Deng T., Wu H.K., Brittain S.T., Whitesides G. M., Prototyping of masks, masters, and stamps/molds for soft lithography using an office printer and photographic reduction, Anal. Chem. 2000 72 3176-3180. 

Zhou, W. et al. 2005. Mechanism for stamp collapse in soft lithography. Appl. Phys. Lett. 87 251925. 

Fig. 8 (a) Schematic representation of the fabrication process for MIP nanopatteming using a hydrophilic PDMS stamp, (b) Dark field microscopy image of an MIP nanopattemed by soft lithography. Inset AFM topography scan of the MIP nanopattem [85]... 

Soft lithography is an emerging method for micro- and nanofabrication of two- or three-dimensional structures on surfaces.73 78 This method developed by Whitesides and coworkers uses elastomeric stamps, molds, and conformable photomasks for creating patterns as small as tens of nanometers on substrates. Depending on the... 

Large Area Stamps, Molds, and Photomasks for Soft Lithography... 

Within the last decade, comparatively inexpensive and scaleable tchniques known as soft lithography have been the focus of much development. Patterning of a substrate is afforded by using a master elastomeric stamp that contains a nanostructured pattern, known as a relief on its surface. Contrary to photolithography, the resolution of the final pattern is not limited by light diffraction, but only depends on the... 

Figure 6.65. Comparison of (a) conventional photolithography/electroplating with (b) soft lithography. Shown in (b) is replica molding which consists of the formation of a PDMS stamp, and subsequent replication of a master in a photo- or thermally curable prepoiymer. Reproduced with permission from Gates, B. D. Xu, Q. Stewart, M. Ryan, D. Willson, C. G. Whitesides, G. M. Chem. Rev. 2005, 105, 1171. Copyright 2005 American Chemical Society.

Fabrication of patterned magnetite films by soft lithography and thermal decomposition using Fe(acac)3 is also possible as described by Yang and coworkers . The modality to obtain such structures on gold substrates is illustrated in Scheme 8. The array size could be tuned by changing the dimension of patterns on poly(drmethylsiloxane) stamps, the concentration of Fe(acac)3 solution and the size of water droplets during the condensation process. 

Fig. 3.5 Fabrication of pp specimens for SPM calibration. The first step (1) comprises soft-lithography of appropriate SAM molecules onto a planar substrate. A composite stamp, which has both flat and corrugated areas, allows printing of the comb-patterned strip with the adjacent solid calibration field. Next, a graded UV-ozonolysis (UVO) systematically modifies the chemistry of the patterned SAM (and calibration field) along one direction (3). For example, methyl-terminated alkyl chain SAMs (hydrophobic) can be gradually converted into carboxylic acid terminated (hydrophilic) chains. Subsequent filling with a hydrophilic SAM completes the matrix of the specimen (2fA...

---