A scanning electron microscope (SEM) is a type of electron microscope that produces images of a sample by scanning it with a focused beam of electrons. The electrons interact with atoms in the sample, producing various signals that can be detected and that contain information about the sample's surface topography and composition. The electron beam is generally scanned in a raster scan pattern, and the beam's position is combined with the detected signal to produce an image. SEM can achieve resolution better than 1 nanometer. Specimens can be observed in high vacuum, in low vacuum, and (in environmental SEM) in wet conditions.
Posts about Sem
  • 3Q’s 2018 Predictions: Paid Search

    … As we head full-steam into 2018, our experts look ahead to the next 12 months and dish up some well-informed predictions on industry trends and shifts. Today’s predictions come from our paid search experts, starting with… “Amazon continues to gobble market share in the ecommerce industry, and in 2018 they’ll figure out a unique way […] The post…

    Hillary Read/ 3Q Digital- 14 readers -
  • Google Ad Suggestions : How to Turn it Off

    … Google’s efforts to create the most value for their AdWords customers may start to backfire on them. With all the great data that the new Google AdWords Beta is supplying to advertisers, a new feature has many upset about automatically generated ads going live without their knowledge. As of recently, Google AdWords started creating Search ad…

    Relevance- 11 readers -
  • Digital Marketing vs. Traditional Marketing

    …What Is Traditional Marketing? Overwhelming choice and a burst of colour is what greets us in most supermarkets today. It’s hard to believe that until the 1950s, plain packaging claimed the shelves of our local greengrocers. Door-to-door salesmen made their way around our neighbourhoods. Subliminal messaging sneaked passed our senses. We teetered…

    Attacat of Edinburghin SEO EMail- 17 readers -
  • The Essential SEM Holiday Campaign Checklist

    … It’s hard to believe that we’re on the home stretch to the biggest month of the year for retailers and advertisers alike. How big, exactly? According to the National Retail Federation, up to 30% of annual sales occur between Thanksgiving and Christmas. If you haven’t started planning your SEM holiday strategy yet, don’t fret! This […] The post The Essential SEM Holiday Campaign Checklist appeared first on 3Q Digital. …

    3Q Digitalin Paid Search- 7 readers -
  • The Right Tools to Track your Local SEO and SEM

    … Tracking your local SEO and SEM is highly important for your SEO and link building strategies. Being able to track these would help determine what strategy works and what does not, which can help you assess and look for other strategies that can be used. While most businesses and companies focus on increasing their internet traffic by using…

    SEO Hacker Blogin Paid Search SEO- 12 readers -
  • How to Maintain and Optimize Alpha Beta Campaigns

    … In my last post, I talked about best practices of building an Alpha Beta campaign (if you’re not familiar with Alpha Beta, which has been the gold standard in SEM for almost a decade, you can download the introductory guide here.) The basic idea is to identify your top-performing queries (Alphas), isolate them for total […] The post How to Maintain and Optimize Alpha Beta Campaigns appeared first on 3Q Digital. …

    3Q Digitalin How To's- 9 readers -
  • How to Build Alpha-Beta Campaigns

    … You know all about Alpha Beta, right? (If not, you can download the introductory guide here.) The basic idea is to identify your top-performing queries (Alphas), isolate them for total control of optimization, and carve out a broader testing ground for potential top performers (Betas) to emerge. That said, there are distinct best practices…

    Caitlin Halpert/ 3Q Digitalin How To's- 11 readers -
  • A guide to brand protection on SEM

    … This post kicks off 3Q’s Brand Protection series, in which we tackle a range of issues to help companies safeguard their most important asset: their brand’s reputation. For a full list of posts, click here. With myriad channels and platforms available to advertisers today, it’s easier than ever to serve your brand to the masses. […] The post…

    3Q Digitalin Paid Search- 16 readers -
  • What is SEM?

    … in. The main consensus As per the original article on this topic, if you had to pick one overall consensus it would be that the major factor in SEM has traditionally been paid search. For the sake of argument let’s refer to paid search as Google Adwords. This is somewhat linked to the more traditional pay to play advertising association…

    Search Engine Watchin Paid Search- 13 readers -
  • 5 remarketing strategies to prep for Q4

    … Remarketing is always one of the most powerful tools in an ecommerce marketer’s belt, but it takes on added importance in Q4. With the holidays fast approaching, you can do a good amount of prep work now to put yourself in a great position to capitalize on the holiday rush. I’ve outlined my five favorite remarketing strategies below. 1. Dynamic…

    Search Engine Watch- 18 readers -
  • The Differences between AdWords Match Types: The Tough SEM Decisions

    … If search engine marketing (SEM) were a game of schoolyard kickball, Google AdWords would get picked first every time. Not only is it the most popular tool for SEM, it’s one of the most effective. But being best (by most accounts, anyway) doesn’t necessarily mean it’s simple. A lot goes into choosing the right keywords [...] Read More... The post The Differences between AdWords Match Types: The Tough SEM Decisions appeared first on Dex Media. …

    Dex Mediain Paid Search- 15 readers -
  • After Some Challenging Pivots, Moz Digs Deeper for Growth

    … It’s been an interesting year for Moz, the Seattle-based SEO-consulting and content marketing company. After several years of fast growth pushing into a variety of different marketing products (like social media, keyword research, and topic analysis), the firm announced last August that it was laying off 28 percent of its workforce in order…

    David Hirschman/ Street Fightin SEO- 18 readers -
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