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Title: Method of making tapered capillary tips with constant inner diameters

Abstract

Methods of forming electrospray ionization emitter tips are disclosed herein. In one embodiment, an end portion of a capillary tube can be immersed into an etchant, wherein the etchant forms a concave meniscus on the outer surface of the capillary. Variable etching rates in the meniscus can cause an external taper to form. While etching the outer surface of the capillary wall, a fluid can be flowed through the interior of the capillary tube. Etching continues until the immersed portion of the capillary tube is completely etched away.

Inventors:
 [1];  [2];  [3];  [3]
  1. West Richland, WA
  2. Kennewick, WA
  3. Richland, WA
Issue Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
960208
Patent Number(s):
7491341
Application Number:
11/394,840
Assignee:
Battelle Memorial Institute (Richland, WA)
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Kelly, Ryan T, Page, Jason S, Tang, Keqi, and Smith, Richard D. Method of making tapered capillary tips with constant inner diameters. United States: N. p., 2009. Web.
Kelly, Ryan T, Page, Jason S, Tang, Keqi, & Smith, Richard D. Method of making tapered capillary tips with constant inner diameters. United States.
Kelly, Ryan T, Page, Jason S, Tang, Keqi, and Smith, Richard D. Tue . "Method of making tapered capillary tips with constant inner diameters". United States. https://www.osti.gov/servlets/purl/960208.
@article{osti_960208,
title = {Method of making tapered capillary tips with constant inner diameters},
author = {Kelly, Ryan T and Page, Jason S and Tang, Keqi and Smith, Richard D},
abstractNote = {Methods of forming electrospray ionization emitter tips are disclosed herein. In one embodiment, an end portion of a capillary tube can be immersed into an etchant, wherein the etchant forms a concave meniscus on the outer surface of the capillary. Variable etching rates in the meniscus can cause an external taper to form. While etching the outer surface of the capillary wall, a fluid can be flowed through the interior of the capillary tube. Etching continues until the immersed portion of the capillary tube is completely etched away.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2009},
month = {2}
}

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Works referenced in this record:

High-quality near-field optical probes by tube etching
journal, July 1999


Porous Polymer Monolith Assisted Electrospray
journal, November 2004


Chemically etched fiber tips for near-field optical microscopy: a process for smoother tips
journal, January 1998


A Design for Low-Flow Sheathless Electrospray Emitters
journal, October 1999


Shape control of near-field probes using dynamic meniscus etching
journal, April 2004


Fabrication Process of Microsurgical Tools for Single-Cell Trapping and Intracytoplasmic Injection
journal, December 2004